California Republic in the context of "Sonoma County, California"

Sonoma (/səˈnoʊmə/) is a city in Sonoma County, California, United States, located in the North Bay region of the San Francisco Bay Area. Sonoma is one of the principal cities of California's Wine Country and the center of the Sonoma Valley AVA. Sonoma's population was 10,739 as of the 2020 census, while the Sonoma urban area had a population of 31,479. Sonoma is a popular tourist destination, owing to its Californian wineries, noted events like the Sonoma International Film Festival, and its historic center.

Sonoma's origins date to 1823, when Padre José Altimira established Mission San Francisco Solano, under the direction of Governor Luis Antonio Argüello. Following the Mexican secularization of the missions, Californio statesman Mariano G. Vallejo founded Sonoma on the former mission's lands in 1835. Sonoma served as the base of General Vallejo's operations until the Bear Flag Revolt in 1846, when American filibusters overthrew the local Mexican government and declared the California Republic, ushering in the American Conquest of California.

Major-General John Charles Frémont (January 21, 1813 – July 13, 1890) was a United States Army officer, explorer, and politician. He was a United States senator from California and was the first Republican nominee for president of the U.S. in 1856 and founder of the California Republican Party upon being nominated. Frémont lost the election to Democrat James Buchanan.

A native of Georgia, he attended the College of Charleston for two years until he was expelled after irregular attendance. In the 1840s, Frémont led five expeditions into the western states. During this time, he directed several massacres of the indigenous peoples in California as part of the California genocide. During the Mexican–American War, he was a major in the United States Army and took control of a portion of California north of San Francisco from the short-lived California Republic in 1846. Frémont was court-martialed and convicted of mutiny and insubordination after a conflict over who was the rightful military governor of California. His sentence was commuted, and he was reinstated by President James K. Polk, but Frémont resigned from the Army. Afterwards, he settled in California at Monterey while buying cheap land in the Sierra foothills. Gold was found on his Mariposa ranch, and Frémont became a wealthy man during the California Gold Rush. He became one of the first two U.S. senators elected from the new state of California in 1850.