Battle of Yerba Buena

Battle of Yerba Buena
Part of Conquest of California
Mexican–American War
DateJuly 9, 1846
Location
Result United States victory
Belligerents
 United States Mexico Mexico
Commanders and leaders
John B. Montgomery José de Jesús Noé
Strength
USS Portsmouth, 220 sailors and enlisted men, 27 marines Unknown number of troops and artillery
Casualties and losses
0 0
Map of Yerba Buena, drawn by Jean Jacques Vioget in 1839; the town square (later renamed Portsmouth Square) is just south of the compass rose.

The Battle of Yerba Buena was an engagement during the Mexican–American War, during which the U.S. Navy captured and occupied the town of Yerba Buena, California (now San Francisco), without firing a shot.