Harrison succeeded in acquiring for the nation as many as 51,000,000 acres from the Indians, after plying five of their chiefs with alcohol, for no more than a penny per 200 acres, and comprising two-thirds of Illinois and sizable chunks of Wisconsin and Missouri. In addition to resulting tensions with the Indians, Harrison's pro-slavery position made him unpopular with the Indiana Territory's abolitionists, as he tried in vain to encourage slavery in the territory. In 1803, he had lobbied Congress to temporarily suspend for ten years Article VI of the Northwest Ordinance prohibiting slavery in the Indiana Territory. Though Harrison asserted that the suspension was necessary to promote settlement and make the territory economically viable and ready for statehood, the proposal failed. Lacking the suspension of Article VI, in 1807 the territorial legislature, with Harrison's support, enacted laws that authorized indentured servitude and gave masters authority to determine the length of service. President Jefferson, primary author of the Northwest Ordinance, made a secret compact with James Lemen to defeat the nascent pro-slavery movement supported by Harrison. He donated $100 to encourage Lemen with abolition and other good works, and later another $20 to help fund the church known as Bethel Baptist Church. In Indiana, the planting of the anti-slavery church led to citizens signing a petition and organizing politically to defeat Harrison's efforts to legalize slavery in the territory. The Indiana Territory held elections to the legislature's upper and lower houses for the first time in 1809. Harrison found himself at odds with the legislature after the abolitionists came to power, and the eastern portion of the Indiana Territory grew to include a large anti-slavery population. The Territory's general assembly convened in 1810, and its anti-slavery faction immediately repealed the indenturing laws previously enacted. After 1809, the Indiana legislature assumed more authority and the territory advanced toward statehood. Army general Tecumseh and Tippecanoe Indian resistance to American expansion came to a head, with the leadership of Shawnee brothers Tecumseh and Tenskwatawa ("The Prophet"), in a conflict that became known as Tecumseh's War. Tenskwatawa convinced the tribes that they would be protected by the Great Spirit and no harm could befall them if they rose up against the settlers. He encouraged resistance by telling the tribes to pay white traders only half of what they owed and to give up all the white man's ways, including their clothing, muskets, and especially