facade. 1  Architecture. the front of a building, especially an imposing or decorative one. 2  a superficial appearance or illusion of something: They managed somehow to maintain a facade of wealth.
The Oregon Territory stretched from the Pacific coast to the Rocky Mountains, encompassing the area including present-day Oregon, Washington, and most of British Columbia. Originally Spain, Great Britain, Russia, and the United States claimed the territory. In 1819, under terms of the Transcontinental Treaty, Spain ceded its claims to the territory to the United States. Shortly thereafter the United States contested a unilateral Russian move to grant its citizens a fishing, whaling, and commercial monopoly from the Bering Straits to the 51st parallel.
When the United States admitted Texas to the Union in 1845, the Mexican government was outraged, and from 1846 to 1848, the two nation's squared off in the Mexican War. With a resounding victory, the United States gained control of Texas, New Mexico, and California. The Oregon territory was annexed in 1846 as well, and the US controlled the land all the way to the Pacific Ocean. As the population of the West soared and the prospects of statehood for western territories appeared clearer and clearer, the nation battled over the future of slavery in the West. This battle was one reason for the Civil War, which slowed the acceleration of expansion.