Fort Mason, Arizona Territory

Following the Gadsden Purchase, the United States Army sent Major Enoch Steen and four companies of the 1st U. S. Dragoons (now the 1st U. S. Cavalry) to occupy the former site of the Mexican Presidio de Calabasas. Major Steen arrived on November 27, 1856, and named his post Camp Moore. The dragoons put roofs on the old adobe structures and added a few new ones. Camp Moore was abandoned in March 1857 after another location in the San Rafael Valley was chosen for a permanent fort that was christened Fort Buchanan.

Fort Mason, Arizona Territory

Following the Gadsden Purchase, the United States Army sent Major Enoch Steen and four companies of the 1st U. S. Dragoons (now the 1st U. S. Cavalry) to occupy the former site of the Mexican Presidio de Calabasas. Major Steen arrived on November 27, 1856, and named his post Camp Moore. The dragoons put roofs on the old adobe structures and added a few new ones. Camp Moore was abandoned in March 1857 after another location in the San Rafael Valley was chosen for a permanent fort that was christened Fort Buchanan.