One of the reasons the Saints had chosen the Great Basin as a settling place was that the area was at the time outside the territorial borders of the United States, which Young had blamed for failing to protect Mormons from political opposition from the states of Missouri and Illinois. However, in the 1848 Treaty of Guadalupe Hidalgo, Mexico ceded the area to the United States. As a result, Brigham Young sent emissaries to Washington, D.C. with a proposal to create a vast State of Deseret, of which Young would naturally be the first governor. Instead, Congress created the much smaller Utah Territory in 1850, and Young was appointed governor in 1851. Because of his religious position, Young exercised much more practical control over the affairs of Mormon and non-Mormon settlers than a typical territorial governor of the time.