Conquest of California

Conquest of California
Part of the Mexican–American War
Date
Location
Result American victory
Treaty of Cahuenga
Full results
Territorial
changes
Mexican Cession (1848)
Belligerents
Mexico
Commanders and leaders
United States John C. Frémont
United States Robert F. Stockton
United States Stephen W. Kearny
California Republic William B. Ide
California Republic Ezekiel Merritt
California Republic Henry L. Ford
United States John D. Sloat
United States John B. Montgomery
United States Archibald Gillespie Surrendered
United States Benjamin Wilson Surrendered
United States William Mervine Surrendered
United States Charles Burroughs
United States James F. Reed
Mexico José Castro
Mexico José María Flores
Mexico Andrés Pico Surrendered
Mexico Mariano Vallejo Surrendered
Mexico Pío Pico
Mexico Joaquín de la Torre
Mexico Mariano Silva
Mexico José de Jesús Noé
Mexico Serbulo Varela
Mexico José del C. Lugo
Mexico José Antonio Carrillo
Mexico Manuel Castro
Mexico Francisco Sánchez
Units involved
Units
Strength
  • United States USA

Initial strength:

  • 30-300 militia
  • Horses and Mules
  • Native American Scouts

Peak strength:

  • 2,000+ personnel (1847)
  • Mexico Mexico

Initial strength:

Peak strength:

  • 500 personnel (Jan. 1847)
Casualties and losses
  • California Republic California Republic:
    • 1-2 killed
    • 3-7 wounded
    • 2 captured or missing
  • United States United States:
    • ~35-40 killed
    • ~53-64 wounded
    • 25 captured or missing
  • Mexico Mexico:
    • ~11-14 killed
    • ~40-60 wounded
    • 2-3 captured or missing

The Conquest of California, also known as the Conquest of Alta California or the California Campaign, was a military campaign of the Mexican–American War carried out by the United States in Alta California (modern-day California), then a part of Mexico. The conquest lasted from 1846 into 1847, until military leaders from both the Californios and Americans signed the Treaty of Cahuenga, which ended the conflict in California.