Presidio Real de San Agustín del Tucson:
Plaza de las Armas,
First Raising of the U.S. Flag within the Walls of Tucson

Spanish Presidio, Plaza de las Armas,
Commemorating the raising of the U.S. Flag on December 16, 1846

El Presidio Plaza
165 W. Alameda Street
Tucson, Pima County, Arizona
32.22306, -110.973784

Historical Significance:
In 1846, seven years before the Gadsden Purchase of 1853, Tucson was yet part of Mexico. During the Mexican-American War (1846-1848), the Mormon Battalion of the U.S. Army marched from Council Bluffs, Iowa, to San Diego, California. After encounters with the Mexican soldiers stationed at the Presidio San Agustín del Tucson, but without military engagement, members of the battalion raised the flag of the United States, reportedly within a barrel of a canon.

This marker can be difficult to find, as it blends with the circular planters. However, it is in a direct line of someone walking between public elevators #2 and #3, as if exiting one of the elevators.

The Mormon Battalion was charged with exploring possible rail routes across the Southwest.


Arizona State Society, DAR

An outdoor scene of a park or plaza with two trees in mid-ground. A stone monolith with a marker with unclear writing is in the foreground. Former Spanish Presidio.
Marker commemorating the first raising of the Flag of the United States, December 16, 1846. Photograph dated September 2018.
An historical plaque mounted on a stone that reads, “Commemorating the Raising of the First American Flag within the Walled City of Tucson / Dec. 16 1846 / Erected by the Daughters of the American Revolution / 1939”. Former Spanish Presidio.
Plaque, September 2018.
To continue the walking tour, please return to the guide.


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Unless otherwise noted, images are courtesy of Arizona State Society, DAR, Daughters.


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