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| Conquest of California | |||||||||
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| Part of the Mexican–American War | |||||||||
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| Belligerents | |||||||||
 Mexico | |||||||||
| Commanders and leaders | |||||||||
 John C. Frémont Robert F. Stockton Stephen W. Kearny William B. Ide Ezekiel Merritt Henry L. Ford John D. Sloat John B. Montgomery Archibald Gillespie  Benjamin Wilson William Mervine Charles Burroughs James F. Reed |
José Castro José María Flores Andrés Pico Mariano Vallejo Pío Pico Joaquín de la Torre Mariano Silva José de Jesús Noé Serbulo Varela José del C. Lugo José Antonio Carrillo Manuel Castro Francisco Sánchez | ||||||||
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Units
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Initial strength:
Peak strength:
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Initial strength:
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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.