The Baptists were a dissenter sect that became especially popular in New England after the First Great Awakening. They diverged from Protestant belief mainly in insisting that only believers should be baptized, and that it should be done by immersion in water and not by sprinkling or pouring water, but they represented the most radical of the radical New Lights and were known for lay preaching and personal spirituality. Wheelock and most of his former students were more moderate New Lights and opposed this sort of radical Christianity. Occom, however, had many connections with Baptist ministers in central New York. On his preaching tour in 1774, he records visiting several Baptist ministers, largely white, and speaking to large crowds, sometimes in the woods. He also records meeting with a "Seven Day Baptist" minister. The Seventh Day or Sabbatarian Baptists differ from Baptist beliefs mainly in observing the Sabbath on Saturday, in accordance with the ten commandments. Baptist belief held a strong attraction for Native peoples because it protected their autonomy and embraced preaching and leadership by lay people. Divides over theology became problematic at Brothertown, where Occom’s moderate sect clashed with the more Baptist sect over whether or not to lease their land to Americans. After Occom’s death, Samuel Ashpo, a Baptist Mohegan minister known for his separatism, began spending more time at Brothertown and built up a substantial Baptist congregation there.

Separatism in late 18th-century colonial New England refers to the radical New Light congregations that split off (separated) from antirevivalist churches, often called Old Lights. These separatist groups were spawned by the preaching of evangelical ministers like Englishman George Whitefield and Anglo-Americans James Davenport and Gilbert Tennent who spread their message through the British Atlantic world during a period called the First Great Awakening (1730s and 1740s). These revivals involved various groups—Baptists, Congregationalists, Moravians, Presbyterians and even Anglicans—and aided the formation of new movements such as Methodism and the Separate movement specific to New England. This movement shared elements of the Separatism of the late 16th and 17th centuries, in which dissenting Protestants in England, often called Puritans, separated from the Church of England because they felt it was not sufficiently reformed or pure. The group misnamed "the Pilgrims" who settled Plimouth Plantation in 1620 were separatists. These elements include an extemporaneous style of preaching that emphasized personal conversion and relatively unmediated spiritual experiences. In the early phase of the revival in New England, prominent conservative ministers welcomed the renewal but the revivals soon became more democratic, anti-authoritarian, and experiential. Thus, the Old Lights opposed revivals while moderate New Lights embraced the Awakening but rejected its excesses and radical practices like stirring up crowds and calling out ministers they considered unconverted. Not all New Lights were Separatists, and though they always remained a minority, many Separate churches split off from Congregational churches during the 1740s across New England; some came to sympathize with local Baptist congregations. Linford Fisher identifies a specific form of Native Separatism during this period modeled on the Anglo-American movement that retained Christian practices but eschewed conventional institutional affiliation.

The Church of England is the governing body of the Anglican Church in Britain and the Episcopalian Church in America. In the eighteenth century, the Church of England was at odds with the “dissenting” sects that had broken off from it during the sixteenth, seventeenth, and eighteenth centuries, including the Congregationalists and Presbyterians. The divide continued in the colonies. The southern colonies (Virginia, Carolina, etc) and New York were predominantly Anglican, while the mid-Atlantic and New England colonies were home to an assortment of dissenting sects. Wheelock and Occom both had conflicts with Episcopalians. Wheelock feuded with the Anglican Society for the Propagation of the Gospel in Foreign Parts (SPG), a functional arm of the Church of England, over access to the Six Nations (the other important Anglican missionary organization, the Society for Promoting Christian Knowledge, or SPCK, was more concerned with book distribution). Meanwhile, Episcopalian ministers in America ordained their own Indian minister and sent him to England prior to Occom’s 1765 fundraising tour to distract attention away from Occom. However, this Indian spoke no English and was not a success. Once in England, Occom met with a cool reception from Anglican clergy, and Occom doubted their sympathy for the Indian cause. He wrote, "they never gave us one single brass farthing. It seems to me that they are very indifferent whether the poor Indians go to Heaven or Hell. I can’t help my thoughts; and I am apt to think they don’t want the Indians to go to Heaven with them" (quoted J. Brooks 86-87). In the broader history of Moor’s Indian Charity School, notable Anglicans include George Whitefield, the famous New Light preacher, and Sir William Johnson, the Superintendent for British Indian Affairs in the North East. Anglican influence, especially via Sir William Johnson, was a large part of the reason why the Mohawks sided with the British during the Revolution.

The Presbyterian Church is a branch of Protestantism that traces its origins to Martin Luther, a German priest and scholar who posted a list of 95 grievances against the Roman Catholic Church on the door of Wittenberg Cathedral in 1517. Twenty years later, a French theologian living in Switzerland named John Calvin further refined this criticism into what became known as Reformed theology, which was brought to Scotland by John Knox, a Scotsman who studied with Calvin in Geneva, and then spread to England. This new theology, eventually codified in the Westminster Confession of Faith, emphasized literacy, education, and lifelong study and interpretation of the scriptures. It also advocated an ascending order of church governance beginning on the local level with the congregation, led by ministers and elders; they were ratified by the next level of governance called a presbytery (from the Greek for “elder”), which was a district court made up of representatives from individual churches. Presbyteries were governed by a synod. This system distinguished Presbyterianism from congregationalism, in which power lies with the local churches, and episcopacy, in which power lies with bishops. In 1640, a congregation in Southampton, Long Island, organized what is considered the oldest Presbyterian church in America. The eastern portion of Long Island, where Occom lived and was ordained, was largely Presbyterian and was culturally more a part of southern New England than New York, an important religious and kinship connection for both Indians and English. The Saybrook Platform, adopted by Connecticut Congregationalists in 1708, acknowledged Presbyterian polity in its creation of “consociations” of regional supervision, an influence that spread through central and western Massachusetts, and later New Hampshire, due to the trade and travel along the Connecticut River. The College of New Jersey (now Princeton), though non-denominational, was founded by a Presbyterian and disseminated those beliefs. In 1741, the Society in Scotland for Propagating Christian Knowledge sent the Presbyterian missionary Azariah Horton to eastern Long Island where he met with some success until Occom arrived, and Samuel Buell, the Presbyterian minister who presided over Occom’s ordination in 1759, led the church at East Hampton, the closest English church to the Montauketts. For teaching and missionary purposes, Occom used the standard Calvinist Presbyterian and Congregational catechism, dating back to 1647. He preached at many Presbyterian churches across New England throughout his career, and in 1791 reported that the new church in New Stockbridge, near Brothertown, which he helped found, “willingly and Cheerfully adopted The Confession of Faith of the Presbyterian Church of the United States in America” (manuscript 791676).

The Tunxis Indians first established a village on the east side of a river (now named the Farmington River) and called it Tunxis Sepus, meaning at the bend of the little river. English settlers renamed it Plantation at Tunxis in 1640, and in 1645, the Connecticut General Assembly incorporated the land, in central Connecticut, as the town of Farmington. Throughout the 18th century, the Tunxis Indians attended church and school with the settlers. In a letter to George Whitefield, Wheelock wrote of a 14-year-old Farmington Indian who demonstrated a gift for learning and knew how to read and write English, indicating that the young Indian might make a great addition to his school. At least six male students who were possibly from Farmington entered the Indian Charity School between 1761 and 1762. Also, Occom's son-in-law, Joseph Johnson, resided in and wrote a letter from Farmington prior to establishing the Brothertown settlement in upstate New York. According to Calloway, the possible Farmington students were Moses, Samuel Ashpo, Daniel Mossuck, and Jacob Fowler, Enoch Closs, Samuel Tallman. However, the letter does not indicate whether the student Wheelock mentions ever attended the school.

The town of Litchfield is located in central Connecticut. The land was inhabited by the Potatuck Tribe, members of the Paugussett confederacy, when the British colonists arrived in the seventeenth century. In the earliest written records, the town’s Native American name is referred to as Bantam, or alternatively Peantam, meaning "he prays" in Algonquian. The name Peantam may have derived from Christian Indians who lived in the area. In 1715, colonists John Mitchell, Joseph Minor, and John Minor purchased a 44,800 acre tract of land for fifteen pounds from the Potatucks, but a provision in the deed stipulated that the Potatucks reserve a piece of land near Mount Tom for their hunting houses. The town was incorporated in 1719 by the Colonial Assembly of Connecticut, and the name was changed to Litchfield after a market center in England. Throughout the 1720s, colonists inhabiting the town built forts and sent alerts to stave off the threat of Native American raids, but throughout the 1730s and 1740s, threats diminished and the town began to stabilize. During the American Revolution, Litchfield served as a center of patriotic activity.

New Milford is a town in Litchfield County on the western border of Connecticut along the Housatonic River. At almost 62 square miles, it is the largest town in the state. The Weantinock Indians, a sub-group of the Paugusset Nation, lived in the area of modern-day New Milford before and during the colonial period. They farmed and fished in freshwater areas. In 1702, 14 Indians conveyed a deed of "A Certain Tract of Land called Weeantenock" to the "Proprietors of New Milford" for "Sixty pounds Current money of this Colony of Connecticut and Twenty pounds in Goods." The Weantinocks left their Fort Hill land, where they had a large settlement and a fort. In 1707 the earliest settlers arrived and began creating farms and homesteads; they petitioned and were granted the privileges of a town in 1712. Many residents fought in the colonial wars and the Revolutionary War. Occom passed through New Milford at the end of December in 1774 during a fierce snow storm, but preached to a large gathering of people.

Norwich is a city in New London County in the southeast corner of Connecticut. It was founded in 1659 when Major John Mason and Reverend James Fitch led English settlers inland from Old Saybrook, CT, on the coast. They bought land from Uncas, sachem of the local Mohegan tribe, and divided it into farms and businesses mainly in the three-mile area around the Norwichtown Green. In 1668, a wharf was built at Yantic Cove and in 1694 a public landing was built at the head of the Thames River, which allowed trade with England to flourish. The center of Norwich soon moved to the neighborhood around the harbor called "Chelsea." During the revolutionary period, when transatlantic trade was cut off, Norwich developed large mills and factories along the three rivers that cross the town: the Yantic, Shetucket and Thames, and supported the war effort by supplying soldiers, ships, and munitions. Norwich was the largest town in the vicinity in which Occom, Wheelock and their associates lived and worked, and it was possible to get there by water because of the harbor and access to the Long Island Sound. Lebanon, CT, the site of Wheelock's school, is 11 miles north and present-day Uncasville, the center of the Mohegan tribe, is a few miles south of Norwich. James Fitch did missionary work among the Mohegans in Norwich until his death in 1702, and Samuel Kirkland, the most important Protestant missionary to the Six Nations trained by Wheelock, was born in Norwich in 1741. On his evangelical tour of North America in 1764, George Whitefield planned to travel to Norwich to meet with Wheelock. The Connecticut Board of Correspondents of the Scottish Society for the Propagation of Christian Knowledge frequently met in Norwich, and many letters by people involved in the missionary efforts of Wheelock were written from Norwich.

Newburgh is a city located in southeastern New York state along the Hudson River. It is also the name of an adjacent town, which was part of the city until 1865 when the city split off from the town. Before the arrival of Europeans, the area was inhabited by the Waoranek Indians, members of the Lenape Tribe of the Algonquin people. In 1684, the governor of New York bought the area that would be Newburgh, along with the land comprising New Windsor, from the Waoranek Tribe for $200, cooking pots, scissors, cloth, shoes and other domestic items. In 1752, England officially recognized the Parish of Newburgh, named after Newborough, Scotland. Newburgh served as an encampment site for many troops during the American Revolution, and the British occupation of New York City caused the population of Newburgh to swell with colonial refugees. In 1800, Newburgh was incorporated.

Blooming Grove is a town in New York's Orange County, on the western bank of the Hudson River north of New York City. The area was originally inhabited by the Minisink Indians, an Algonquian-speaking part of the Lenni-Lenape Nation, before colonists pressured them to sell their lands in the 17th and 18th centuries. By 1765, only 750 Minisinks remained in Orange County. When Henry Hudson sailed up the Hudson River in 1609, he dropped anchor near what would become Cornwall, NY. Blooming Grove was an area of the town of Cornwall until 1799, when it separated to form its own town. In his journal for 1775, Occom records a visit to Blooming Grove, which had a Presbyterian Church and, thus, an interested populace, as part of his preaching tour. He stayed with John Brewster, the Cornwall town clerk, and preached to the townspeople. In another undated journal entry, Occom fondly recounts a past visit to Blooming Grove during which he gave a young girl a book, and his later encounter with this woman as an adult while visiting near Fort Hunter, NY.

The Connecticut River is the largest and longest in New England. It originates in northern New Hampshire, runs south through western Massachusetts and Connecticut and empties into Long Island Sound. Although Governor Wentworth offered several parcels of land in the colony of New Hampshire as potential sites for the Indian school and college, Wheelock lobbied hard to locate them in Hanover, on a parcel that bordered the Upper Connecticut River, in part because the waterway provided an important means of transportation in unsettled territory with few roads. It gave him access to western Massachusetts and Connecticut, where, in fact, many of the settlers already in the area had come up the river from Connecticut, and also provided proximity to the Canadian Indian tribes, who, after the Oneidas pulled all their children from the School in 1769, became Wheelock’s prime target for recruitment.

Poughkeepsie is a city in New York’s Dutchess County on the eastern shore of the Hudson River, located about halfway between Albany and New York City. The area was originally inhabited by the Algonquin-speaking Wappinger Indians who named the area Apokeepsing, meaning "safe harbor." Europeans were slow to colonize the eastern bank of the Hudson, but in 1683 the expanding English presence in New York prompted a Wappinger named Massany to sign a deed granting Wappinger land to two Dutch settlers who planned to build a mill on the land. In 1687, a colonial land patent given to Thomas Sanders and Myndert Harmse superseded this deed, and Wappinger land was quickly parceled off to the Dutch and English as homesteads. Wappingers continued to inhabit the area until the mid-1700s, when disease and overcrowding forced them to migrate to Stockbridge, MA, an Indian Town to which many New England Indian tribes fled. Occom often preached in Poughkeepsie beginning in the 1760s until the end of his life, though it was to a primarily European audience. He stopped by the town while traveling between Albany and New York on a route known as the Indian Trail. Poughkeepsie was spared during the American Revolution and, as a result, it became the capital of New York in 1778, until Albany took that honor in 1797.

Samson Occom was a Mohegan leader and ordained Presbyterian minister. Occom began his public career in 1742, when he was chosen as a tribal counselor to Ben Uncas II. The following year, he sought out Eleazar Wheelock, a young Anglo-American minister in Lebanon, CT, in hopes of obtaining some education and becoming a teacher at Mohegan. Wheelock agreed to take on Occom as a student, and though Occom had anticipated staying for a few weeks or months, he remained with Wheelock for four years. Occom’s academic success inspired Wheelock to open Moor’s Indian Charity School in 1754, a project which gave him the financial and political capital to establish Dartmouth College in 1769. After his time with Wheelock, Occom embarked on a 12-year mission to the Montauk of Long Island (1749-1761). He married a Montauk woman, Mary Fowler, and served as both teacher and missionary to the Montauk and nearby Shinnecock, although he was grievously underpaid for his services. Occom conducted two brief missions to the Oneida in 1761 and 1762 before embarking on one of the defining journeys of his career: a fundraising tour of Great Britain that lasted from 1765 to 1768. During this journey, undertaken on behalf of Moor’s Indian Charity School, Occom raised £12,000 (an enormous and unanticpated amount that translates roughly to more than two-million dollars), and won wide acclaim for his preaching and comportment. Upon his return to Mohegan in 1768, Occom discovered that Wheelock had failed to adequately care for his family while he was gone. Additionally, despite the vast sums of money that he had raised, Occom found himself unemployed. Wheelock tried to find Occom a missionary position, but Occom was in poor health and disinclined to leave his family again after seeing the treatment with which they had met while he was in Britain. Occom and Wheelock’s relationship continued to sour as it became apparent to Occom that the money he had labored to raise would be going towards infrastructure at Dartmouth College, Wheelock’s new project, rather than the education of Native Americans. After the dissolution of his relationship with Wheelock, Occom became increasingly focused on the needs of the Mohegan community and increasingly vocal in criticizing Anglo-Americans’ un-Christian treatment of Native Americans. In September of 1772, he delivered his famous “Sermon on the Execution of Moses Paul,” which took Anglo-American spiritual hypocrisy as one of its major themes, and which went into four printings before the end of the year. In 1773, Occom became further disillusioned when the Mason Land Case was decided in favor of the Colony of Connecticut. The details of the Mason Case are complicated, but to summarize: the Colony of Connecticut had gained control of Mohegan land early in the 18th century under very suspect circumstances, and successfully fended off the Mohegan’s 70-year-long legal challenge. The conclusion of the case came as a blow to the Mohegans, and further convinced Occom of Anglo-American corruption. Along with David Fowler (Montauk Tribe), Occom's brother-in-law, and Joseph Johnson (Mohegan), Occom's son-in-law, Occom helped found Brothertown, an Indian tribe formed from the Christian Mohegans, Pequots, Narragansetts, Montauks, Tunxis, and Niantics. They eventually settled in Oneida country in upstate New York. Occom moved there with his family in 1789, spending the remaining years of his life serving as a minster to the Brothertown, Stockbridge, and Mohegan Indians. Harried by corrupt land agents, the Brothertown and Stockbridge groups relocated to the eastern shore of Lake Winnebago, though Occom died in 1792 before he could remove himself and his family there. Occom's writings and legacy have made him one of the best known and most eminent Native Americans of the 18th century and beyond.

Theophilus Baldwin served as the Separatist Congregationalist Deacon of New Milford, Connecticut. According to Occom's journal, Occom lodged at his home and met with him on at least two occasions.

Ebenezer Little was a Massachusetts merchant and a supporter of Wheelock's school, who shipped goods to Wheelock and helped the design however he could. His commitment to Wheelock's Indian School was such that the Reverend Parsons mentioned it in his sermon at Little's funeral. Manuscript 764662, not included in the Occom Circle, relates to Wheelock and Little's trade relationship. Little was very involved in the Presbyterian Church at Newburyport, as well as local government.

Elijah Wympy was a prominent Farmington Indian who was instrumental in establishing Brothertown, yet he subsequently led a group that disregarded the primary vision of the community. In his early years he was a student at the school in Farmington, CT, and in 1757 he served in the Seven Years’ War. During negotiations around 1773 between the Oneida and New England Indians concerning a tract of land, Wympy acted as a delegate for Farmington and asked other tribes to send envoys too. The Oneidas granted the territory the following year, and in 1775 Wympy was among the first to move to what became Brothertown. He was chosen as a trustee of the town in 1785, but around this time the Oneidas attempted to reclaim the land. Accordingly, Wympy participated in the effort to maintain the territory. Fortunately, when the state of New York gained Oneida territory in 1788, it acknowledged the Christian Indians’ right to the tract as it had originally been granted; the state passed an act in 1789 that recognized the Indians’ property and instituted a 10-year limit on leases for lots. Wympy and his followers, comprised mainly of outsiders, thus leased numerous parcels, including invaluable ones, to white settlers. Occom strongly opposed this and petitioned the Assembly, which passed an act in 1791 restricting the power to lease lands to the council. While Occom and Wympy had previously been friends -- Wympy had even partaken in the movement to establish Occom as the local minister -- their disagreement on the issue of leasing Brothertown lands to whites opened a strong divide between them. Wympy apparently regretted his actions, for in 1794 he was among the signers of an address to the governor seeking to remove the whites. He remained in Brothertown until his death around 1802.