Yuma Crossing
Immediately after the Mexican–American War in 1848, the U.S. Army built Fort Yuma here to protect travelers from Indians raiding the area. It was the center point of conflict in the Yuma War of 1850–53. From 1864–1890, the fort and nearby facilities was the main army base to support the US Army's efforts to control the Indians throughout the greater southwest.
Centralist Republic of Mexico
After Federalism was restored in 1846, Yucatán decided rejoin Mexico, but a considerable minority opposed the reinstatement due to the U.S. invasion of Mexico in the Mexican–American War (1846–48). On 30 July 1847, Yucatán's Maya population rebelled in a conflict now known as the Caste War. The war forced Yucatán to seek help from Mexico, which negotiated their return to the Republic, which took place on 17 August 1848. The conflict in Yucatan was largely contained, with the Yucatecan government declaring victory. However, pockets of resistance continued to exist for another 50 years, when Mexican army troops destroyed the last Maya stronghold.