From the plaque:
Formally established on September
17, 1776, the San Francisco Presidio has been administered successfully as
a military headquarters by Spain, Mexico, and the United
States. A major command post during the Mexican
War, Civil War, Spanish-American War, World Wars I and
II, and the Korean War, and remains a symbol of United
States authority in the Pacific.
Plaque placed by the California State Park Commission in cooperation with the California History Commission and the United States Army, September 18, 1965.