such as Jedediah Smith, Hugh Glass, Davy Crockett, Jack Omohundro, and others. The trade in beaver fur virtually ceased by 1845. The federal government and westward expansion There was wide agreement on the need to settle the new territories quickly, but the debate polarized over the price the government should charge. The conservatives and Whigs, typified by the president John Quincy Adams, wanted a moderated pace that charged the newcomers enough to pay the costs of the federal government. The Democrats, however, tolerated a wild scramble for land at very low prices. The final resolution came in the Homestead Law of 1862, with a moderated pace that gave settlers 160 acres free after they worked on it for five years. The private profit motive dominated the movement westward, but the federal government played a supporting role in securing the land through treaties and setting up territorial governments, with governors appointed by the President. The federal government first acquired western territory through treaties with other nations or native tribes. Then it sent surveyors to map and document the land. By the 20th century, Washington bureaucracies managed the federal lands such as the General Land Office in the Interior Department, and after 1891, the Forest Service in the Department of Agriculture. After 1900, dam building and flood control became major concerns. Transportation was a key issue and the Army (especially the Army Corps of Engineers) was given full responsibility for facilitating navigation on the rivers. The steamboat, first used on the Ohio River in 1811, made possible inexpensive travel using the river systems, especially the Mississippi and Missouri rivers and their tributaries. Army expeditions up the Missouri River in 1818–1825 allowed engineers to improve the technology. For example, the Army's steamboat "Western Engineer" of 1819 combined a very shallow draft with one of the earliest stern wheels. In 1819–1825, Colonel Henry Atkinson developed keelboats with hand-powered paddle wheels. The federal postal system played a crucial role in national expansion. It facilitated expansion into the West by creating an inexpensive, fast, convenient communication system. Letters from early settlers provided information and boosterism to encourage increased migration to the West, helped scattered families stay in touch and provide neutral help, assisted entrepreneurs to find business opportunities, and made possible regular commercial relationships between merchants and the West and wholesalers and factories back east. The postal service likewise assisted the Army in expanding control over