USS Cyane at San Diego was a Mexican-American War engagement fought in California, 1846. It was a United States victory.
The USS Cyane played a significant role in the United States Navy's operations during the Mexican-American War, particularly in the Pacific Theater. The ship had been assigned to the Pacific Squadron and was actively involved in operations along the California coast during the conflict.
On 7 July 1846, Captain William Mervine, commanding officer of the Cyane, led a detachment of Marines and sailors from Commodore John D. Sloat's squadron ashore at Monterey, California. This force hoisted the American flag at the Customs House and claimed possession of the city and all of present-day California. Subsequently, on 26 July 1846, Lieutenant Colonel John C. Frémont's California Battalion boarded the Cyane, which was now under the command of Commander Samuel Francis Du Pont. The ship then sailed for San Diego, California on 29 July 1846, continuing its mission to secure American control of the California coast.
Upon arrival at San Diego, the Cyane landed Marines at La Playa, a location near San Diego. These Marines were warmly welcomed by the largely pro-American civilian population in the area. This reception reflected significant local support for American forces in California during the Mexican-American War, facilitating the relatively peaceful assertion of American authority in the region.
Approximate location. The nearest recorded settlement is shown; the exact site is unrecorded.
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