
The Tucson basin was home to Hohokam civilization for over 1,000 years. The Tohono O'odham later inhabited the region. Inter-tribal conflicts were minimal compared to European colonial violence.
Spanish arrived in the 1690s under Father Kino. Presidio San Agustín del Tucson founded in 1775. Spanish missionaries forced conversion of Indigenous peoples. Apache resisted Spanish encroachment fiercely, leading to centuries of conflict.
In 1846, the US invaded Mexico. The Treaty of Guadalupe Hidalgo in 1848 ceded Arizona to the US. The Gadsden Purchase of 1854 finalized the border. Tucson became American territory through conquest.
The US Army waged a brutal war against Apache people. Cochise and Geronimo led Apache resistance. The Camp Grant Massacre of 1871 saw 140 Apache murdered while under US protection. Apache were eventually forced onto reservations.
The US military, collaborating with Mexican forces, conducted campaigns against Yaqui people who fled persecution in Mexico. Yaqui were hunted and deported from Arizona.
Tucson hosted POW camps for German and Italian prisoners. Prisoners were put to work in agriculture. Meanwhile Japanese Americans from Arizona were incarcerated in camps.