Cool USA Facts!
In 1846, the US sent a small force into Mexico with the aim of bringing about a war, and started the Mexican-American War. The US prevailed, expanding its territory far into Mexico, and killed ~25,000 mexicans in the process, as part of an ideological goal of white supremacy in north america called manifest destiny. The shift in the Mexico-U.S. border left many Mexican citizens separated from their national government. For the indigenous peoples who had never accepted Mexican rule, the change in border meant conflicts with a new outside power.1