Final answer:
Around 200 Texans and Southern volunteers died during the Alamo siege, a key event in the Texas Revolution that ended with nearly all defenders killed after a staunch resistance.
Step-by-step explanation:
Approximately 200 Texans and Southern volunteers died during the Alamo siege. The battle at the Alamo was a pivotal event during the Texas Revolution, where Santa Anna and his army besieged the mission occupied by Texan defenders including famous figures like Davy Crockett and Jim Bowie. Despite a courageous stand, after approximately ten days, the mission was overtaken and nearly all of the defenders were killed. A few noncombatants were spared, and the high casualty rates signified the ferocity of the conflict. The siege and subsequent legends galvanized support for the Texan cause, exemplified by the rallying cry "Remember the Alamo!" used later at the Battle of San Jacinto, which resulted in a decisive Texan victory and ultimately led to Texas independence.