California Battalion

California Battalion
Grigsby Company Bear Guidon (E company)
Active	June 1846 – May 1847
Disbanded	May 31, 1847
Country	California Republic
Allegiance	United States,  California Republic
Branch	California Army
Type	Mounted Infantry
Size	Battalion
Garrison/HQ	Sonoma, California
Nickname(s)	Fremont's Battalion
Engagements	Bear Flag Revolt Capture of Sonoma (1846) Battle of Olómpali (1846) Skirmish at San Rafael (1846) Mexican-American War Battle of San Pasqual (1846) Battle of Natividad (1846) "Battle" of Fremont's Pass (1846) Battle of Rio San Gabriel (1847)
Commanders
Current commander	William B. Ide John C. Frémont

The California Battalion (also called the first California Volunteer Militia and U.S. Mounted Rifles) was formed during the Mexican–American War (1846–1848) in present-day California, United States. It was led by U.S. Army Brevet Lieutenant Colonel John C. Frémont and composed of his cartographers, scouts and hunters and the California Volunteer Militia formed after the Bear Flag Revolt. The battalion's formation was officially authorized by Commodore Robert F. Stockton, commanding officer of the U.S. Navy Pacific Squadron.