Chiricahua ( ) are a band of Apache Native Americans, based in the Southern Plains and Southwest United States. Culturally related to other Apache peoples, Chiricahua historically shared a common area, language, customs, and intertwined family relations. At the time of European contact, they had a territory of 15 million acres (61,000 km²) in Southwestern New Mexico and Southeastern Arizona in the United States and in Northern Sonora and Chihuahua in Mexico.