Virginia in May 1607, and established a settlement named for the king, Jamestown. Life in the colony was perilous, and many died during the Starving Time in 1609 and in a series of conflicts with the Powhatan Confederacy that started in 1610, and flared up again in 1622, when led by Powhatan's brother, Opechancanough. Only 3,400 of the 6,000 early settlers had survived by 1624. However, European demand for tobacco fueled the arrival of more settlers and servants. The headright system tried to solve the labor shortage by providing colonists with land for each indentured servant they transported to Virginia. Colonists struggled with rule from both the London Company and English monarchy, which took direct control of the colony in 1624 in part because in 1619, colonists had gained greater local control with an elected leadership. Later called the House of Burgesses, it shared power with the governors appointed by the crown. In 1635, colonists arrested a despised governor and forced him to return to England against his will. The turmoil of the English Civil War permitted Virginia even greater autonomy during the 1650s, and many supporters of the king fled to the colony, becoming known as "Virginia Cavaliers." African workers were first imported to Jamestown in 1619 initially under the rules of indentured servitude. The shift to a system of African slavery in Virginia was propelled by the legal cases of John Punch, who was sentenced to lifetime slavery for attempting to escape servitude in 1640, and of John Casor, who was claimed by Anthony Johnson as his servant for life in 1655. Slavery first appears in Virginia statutes in 1661 and 1662, when a law made it hereditary based on the mother's status. Tensions and the geographic differences between the working and ruling classes led to Bacon's Rebellion in 1676, by which time current and former indentured servants made up as much as eighty percent of the population. The rebels, who burned Jamestown, were largely from the colony's frontier, and opposed to the governor's conciliatory policy towards native tribes. One result of the rebellion was the signing at Middle Plantation of the Treaty of 1677, which made the signatory tribes tributary states and was part of a pattern of appropriating tribal land by force and treaty. In 1693, the College of William & Mary was founded in Middle Plantation, which was renamed Williamsburg in 1699, when it became