History: American Old West, United States

While the profit motive dominated the movement westward, the Federal government played a vital role in securing land and maintaining law and order, which allowed the expansion to proceed. Despite the Jeffersonian aversion and mistrust of federal power, it bore more heavily in the West than any other region, and made possible the fulfillment of Manifest Destiny. Since local governments were often absent or weak, Westerners, though they grumbled about it, depended on the federal government to protect them and their rights, and displayed little of the outright antipathy of some Easterners to Federalism.
The federal government established a sequence of actions related to control over western lands. First, it acquired western territory from other nations or native tribes by treaty, then it sent surveyors and explorers to map and document the land, next it ordered federal troops to clear out and subdue the resisting natives, and finally, it had bureaucracies manage the land, such as the Bureau of Indian Affairs, the Land Office, the U.S. Geological Survey, and the Forest Service. The process was not a smooth one. Indian resistance, sectionalism, and racism forced some pauses in the process of westward settlement. Nonetheless, by the end of the 19th century, in the process of conquering and managing the West, the federal government amassed great size, power, and influence in national affairs.
• Early scientific exploration and surveys
A major role of the federal government was sending out surveyors, naturalists, and artists into the West to discover its potential. Following the Lewis and Clark expeditions, Zebulon Pike led a party in 1805-6, under the orders of General James Wilkinson, commander of the western American army. Their mission was to find the head waters of the Mississippi (which turned out to be Lake Itasca, and not Leech Lake as Pike concluded). Later, on other journeys, Pike explored the Red and Arkansas Rivers in Spanish territory, eventually reaching the Rio Grande. On his return, Pike sighted the peak named after him, was captured by the Spanish and released after a long overland journey. Unfortunately, his documents were confiscated to protect territorial secrets and his later recollections were rambling and not of high quality. Major Stephen H. Long led the Yellowstone and Missouri expeditions of 1819-1820, but his categorizing of the Great Plains as arid and useless led to the region getting a bad reputation as the "Great American Desert", which discouraged settlement in that area for several decades.