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.
Inca Civil War
The Inca Civil War, also known as the Inca Dynastic War, the Inca War of Succession, or, sometimes, the War of the Two Brothers was fought between two brothers, Huáscar and Atahualpa, sons of Huayna Capac, over the succession to the throne of the Inca Empire. The war followed Huayna Capac's death in 1527, although it did not begin until 1529, and lasted until 1532. Huáscar initiated the war because he saw himself as the rightful heir to the kingdom of all the Incas. Regardless of legitimacy, Atahualpa proved himself to be tactically superior to his brother in warcraft and to the mighty armies of Cuzco, which their father had stationed in the north part of the empire during the military campaign. Accounts from sources all vary in the exact details.