The California Republic, commonly known as the Bear Flag Republic, was a short-lived unrecognized breakaway state from Mexico, that existed from June 14 to July 9, 1846. It militarily controlled an area north of San Francisco, in and around what is now Sonoma County in California.
In June 1846, 33 American immigrants in Alta California who had entered without official permission rebelled against the Mexican department's government. Among their grievances were that they hadn’t been allowed to buy or rent land and had been threatened with expulsion. Mexican officials had been concerned about a coming war with the United States and the growing influx of Americans into California. The rebellion was covertly encouraged by U.S. Army Brevet Captain John C. Frémont, and added to the troubles of the recent outbreak of the Mexican–American War.
The name "California Republic" appeared only on the flag the insurgents raised in Sonoma. It indicated their aspiration of forming a republican government under their control. The rebels elected military officers but no civil structure was ever established. Their flag, featuring a silhouette of a California grizzly bear, became known as the "Bear Flag" and was later the basis for the official state flag of California.
Three weeks later, on July 5, 1846, the Republic's military of 100 to 200 men was subsumed into the California Battalion commanded by Brevet Captain John C. Frémont. The Bear Flag Revolt and what remained of the California Republic ceased to exist on July 9 when U.S. Navy Lieutenant Joseph Revere raised the United States flag in front of the Sonoma Barracks and sent a second flag to be raised at Sutter's Fort.
Background of the Bear Flag Revolt
By 1845–46, Alta California had been largely neglected by Mexico for the twenty-five years since Mexican independence. It had evolved into a semi-autonomous region with open discussions among Californios about whether California should remain with Mexico; seek independence; or become annexed to the United Kingdom, France, or the United States. In 1845, the widely hated Manuel Micheltorena, the latest governor to be sent by Mexico, was forcefully ejected by the Californians. His forces were defeated at the Battle of Providencia (also known as the Second Battle of Cahuenga Pass) as a result of the actions of California pioneer John Marsh. This resulted in the return of Californian Pio Pico to the governorship. Pico ruled the region south of San Luis Obispo with his capital in The Town of Our Lady the Queen of Angels of the Porciúncula River, now known as Los Angeles. The area to the north of the pueblo of San Luis Obispo was under the control of Alta California's Commandante José Castro with headquarters near Monterey, the traditional capital and, significantly, the location of the Customhouse. Pico and Castro disliked each other personally and soon began escalating disputes over control of the Customhouse income.
Decrees issued by the central government in Mexico City were often acknowledged and supported with proclamations but ignored in practice. By the end of 1845, when rumors of a military force being sent from Mexico proved to be false, rulings by the other district government were mostly ignored.
The relationship between the United States and Mexico had been deteriorating for some time. The Republic of Texas, which Mexico still considered to be its territory, had been admitted to statehood in 1845. Mexico had earlier threatened war if this happened. James K. Polk was elected President of the United States in 1844, and considered his election a mandate for his expansionist policies.
Mexican law had long allowed grants of land to naturalized Mexican citizens. Obtaining Mexican citizenship was not difficult and many earlier American immigrants had gone through the process and obtained free grants of land. That same year (1845), anticipation of war with the United States and the increasing number of immigrants reportedly coming from the United States resulted in orders from Mexico City denying immigrants from the United States entry into California. The orders also required California's officials not to allow land grants, sales or even rental of land to non-citizen emigrants already in California. All non-citizen immigrants, who had arrived without permission, were threatened with being forced out of California.
Alta California's Sub-Prefect Francisco Guerrero had written to U.S. Consul Thomas O. Larkin that:
a multitude of foreigners [having] come into California and bought fixed property [land], a right of naturalized foreigners only, he was under the necessity of notifying the authorities in each town to inform such purchasers that the transactions were invalid and they themselves subject to be expelled whenever the government might find it convenient.
During November 1845, California's Commandante General José Castro met with representatives of the 1845 American immigrants at Sonoma and Sutter's Fort. In his decree dated November 6 he wrote: "Therefore conciliating my duty [to enforce the orders from Mexico] with of the sentiment of hospitality which distinguishes the Mexicans, and considering that most of said expedition is composed of families and industrious people, I have deemed it best to permit them, provisionally, to remain in the department" with the conditions that they obey all laws, apply within three months for a license to settle, and promise to depart if that license was not granted.
A 62-man exploring and mapping expedition entered California in late 1845 under the command of U.S. Army Brevet Captain John C. Frémont. Frémont was well known in the United States as an author and explorer. He was also the son-in-law of expansionist U.S. Senator Thomas Hart Benton. Early in 1846 Frémont acted provocatively with California's Commandante General José Castro near the pueblo of Monterey and then moved his group out of California into Oregon Country. He was followed into Oregon by U.S. Marine Lt Archibald H. Gillespie who had been sent from Washington with a secret message to U.S. Consul Thomas O. Larkin and instructions to share the message with Frémont. Gillespie also brought a packet of letters from Frémont's wife and father-in-law.
Frémont's thoughts (as related in his book, written forty years later) after reading the message and letters were: "I saw the way opening clear before me. War with Mexico was inevitable; and a grand opportunity presented itself to realize in their fullest extent the far-sighted views of Senator Benton. I resolved to move forward on the opportunity and return forthwith to the Sacramento Valley in order to bring to bear all the influence I could command." Nevertheless, Frémont needed to be circumspect. As a military officer he could face court-martial for violating the Neutrality Act of 1794 that made it illegal for an American to wage war against another country at peace with the United States. The next morning Gillespie and Frémont's group departed for California. Frémont returned to the Sacramento Valley and set up camp near Sutter Buttes.
USS Portsmouth in the San Francisco Bay
U.S. Consul Thomas O. Larkin, concerned about the increasing possibility of war, sent a request to Commodore John D. Sloat of U.S. Navy's Pacific Squadron, for a warship to protect U.S. citizens and interests in Alta California. In response, the USS Portsmouth arrived at Monterey on April 22, 1846. After receiving information about Frémont's returning to California, Consul Larkin and Portsmouth's captain John Berrien Montgomery decided the ship should move into the San Francisco Bay. She sailed from Monterey on June 1.
Lt. Gillespie, having returned from the Oregon Country and his meeting with Frémont on June 7, found Portsmouth moored at Sausalito. He carried a request for money, materiel and supplies for Frémont's group. The requested resupplies were taken by the ship's launch up the Sacramento River to a location near Frémont's camp.
William B. Ide, a future leader of the Revolt, writes of receiving an unsigned written message on June 8, 1846: "Notice is hereby given, that a large body of armed Spaniards on horseback, amounting to 250 men, have been seen on their way to the Sacramento Valley, destroying crops and burning houses, and driving off the cattle. Capt. Fremont invites every freeman in the valley to come to his camp at the Butts [sic], immediately; and he hopes to stay the enemy and put a stop to his" – (Here the sheet was folded and worn in-two, and no more is found). Ide and other settlers quickly traveled to Frémont's camp but were generally dissatisfied by the lack of a specific plan and their inability to obtain from Frémont any definite promise of aid.