Yuma War
The Yuma War was the name given to a series of United States military operations conducted in southern California and what is today southwestern Arizona from 1850 to 1853. The Yumans were the primary opponent of the United States Army, though engagements were fought between the Americans and other native groups in the region. Conflict generally took the form of guerrilla warfare, and, over the course of three years, the army engaged in pursuing unfriendly natives, protecting American settlers crossing the Colorado River and preventing conflict between the native tribes. A peace treaty in summer of 1853 was signed, ending hostilities between the Yuma and the United States, but it sparked a short war between the Yuma and the Cocopah. During the conflict, the historic Fort Yuma was constructed and became an important outpost on the frontier.
War of the Confederation
The War of the Confederation () was a conflict between the Peru-Bolivian Confederation and a coalition of Argentina and the United Restorative Army, composed of Chile and North Peruvian dissidents, from 1836 to 1839. The creation of the Peru-Bolivian Confederation under Andrés de Santa Cruz started a power struggle in southern South America, with Chile and Argentina independently invading the Confederation to protect their interests, fearing the potential political, military, and economic power of the new state. Argentina was defeated in 1837, but the conflict continued for two years until United Restoration Army victory following the Battle of Yungay, resulting in the dissolution of the Peru-Bolivian Confederation, the exile of Santa Cruz, and the restoration of Peru and Bolivia as separate countries.