The Battle of San Pasqual was a military encounter that occurred during the Mexican-American War in what is now the San Pasqual Valley community of the city of San Diego, California. On December 6 and December 7, 1846, the Californios, and their Presidial Lancers, led by General Don Andres Pico, (1810-1876), defeated Stephen W. Kearny´s US Army column of 150 men.
One of the key figures of the Mexican War was James K. Polk (Democratic; expansionist) who provoked and supported the war. Description from apushpproject2k12.weebly.com. I searched for this on bing.com/images