In December 1835, a group of annoyed settlers and natives led by Benjamin Milam started an attack on Mexican military unit in San Antonio. The battle was bitter but in the end the Mexicans were forced to surrender. Over the next 2 months the group tried to strength their forces, but were surprised when on February 23, 1836, they saw General Antonio López de Santa Anna's army of 2,000 men. Then on March 6, Santa Anna's forces began an attack on The Alamo. By the end of the day 187 people had been killed.