Two hundred reinforcements were sent by Stockton, led by US Navy Captain William Mervine, but were repulsed in the Battle of Dominguez Rancho, October 7–9, 1846, near San Pedro, where 14 U.S. Marines were killed. Meanwhile, General Kearny with a much-reduced squadron of 100 dragoons finally reached California after a grueling march from Santa Fe, New Mexico across the Sonoran Desert. On December 6, 1846, they fought the Battle of San Pasqual near San Diego, where 18 of Kearny's troops were killed—the largest number of American casualties lost in any battle in California.