Presidio San Ignacio de Tubac

Fort Tubac
Tubac, Arizona
Tubac as a United States Army post in 1869
Coordinates	31°36′41″N 111°02′45″W / 31.611389°N 111.045833°W / 31.611389; -111.045833Coordinates: 31°36′41″N 111°02′45″W / 31.611389°N 111.045833°W / 31.611389; -111.045833
Type	Army post
Site information
Controlled by	Arizona
Condition	tourist attraction
Site history
Built	1752
Built by	Spain
In use	1752-1886
Battles/wars	Apache–Mexico Wars Apache Wars American Civil War Siege of Tubac
Garrison information
Past commanders	Juan Bautista de Anza Juan Fernandez Carmona Granville H. Oury
Occupants	Spanish Army Mexican Army United States Army Confederate States Army

Apache–Mexico Wars
Apache Wars
American Civil War

The Presidio of San Ignacio de Túbac or Fort Tubac was a Spanish built fortress. The fortification was established by the Spanish Army in 1752 at the site of present-day Tubac, Arizona.

The presidio housed a garrison of about fifty cavalry and or infantry soldiers and was intended to protect Spanish settlements and missions in the valley of the Santa Cruz River. In 1766, the garrison had 51 officers and men, and a settlement of forty families had grown up around the post. In 1774, Tubac's commander, Captain Juan Bautista de Anza, assembled the expedition that explored a land route from the Santa Cruz Valley to California.

A reorganization of frontier defenses in 1775 resulted in the transfer of the garrison. The force under Lieutenant Juan Fernandez Carmona was enlarged to fifty-six officers and men and received orders to proceed forty miles north to a site within present-day downtown Tucson, Arizona. There they constructed the Presidio San Augustin del Tucson in 1775 under the orders of Captain Hugh O'Conor. Eventually a new garrison formed in the Tubac presidio, which campaigned against the Apaches for decades until the Mexican War of Independence.