The Chamizal dispute was caused by a shift in which one of the principal rivers in the southwest United States and northern Mexico?
Chamizal dispute The Chamizal dispute was a border conflict over about 600 acres on the Mexico–United States border between El Paso, Texas, and Ciudad Juárez, Chihuahua. It was caused by a shift in the Rio Grande, as a survey presented in 1852 marked differences between the bed of the Rio Grande (in Spanish: "Río Bravo del Norte" ) and the present channel of the river. The Chamizal was once the only link between El Paso and Ciudad Juárez and tensions over the territory during the historic Taft–Diaz summit almost resulted in the attempted assassination of both presidents on October 16, 1909.
Pima Villages Pima Villages, sometimes mistakenly called the Pimos Villages in the 19th century, were the Akimel O’odham (Pima) and Pee-Posh (Maricopa) villages in what is now the Gila River Indian Community in Pinal County, Arizona. First, recorded by Spanish explorers in the late 17th century as living on the south side of the Gila River, they were included in the Viceroyalty of New Spain, then in Provincias of Sonora, Ostimuri y Sinaloa or New Navarre to 1823. Then from 1824 to 1830, they were part of the Estado de Occidente of Mexico and from September 1830 they were part of the state of Sonora. These were the Pima villages encountered by American fur trappers, traders, soldiers and travelers along the middle Gila River from 1830's into the later 19th century. The Mexican Cession following the Mexican American War left them part of Mexico. The 1853 Gadsden Purchase made their lands part of the United States, Territory of New Mexico. During the American Civil War they became part of the Territory of Arizona.