Final answer:
The battle cry from the defeat of the Alamo supported the Texas Rebels by inspiring and motivating them to continue their fight for independence.
Step-by-step explanation:
The defeat of the Alamo and the battle cry that emerged from it immensely supported the Texas Rebels in their fight for independence. The battle cry, 'Remember the Alamo!', served as a rallying point for the Texan revolutionaries, inspiring and motivating them to continue their resistance against Mexico.
The martyrdom of the defenders at the Alamo, including notable figures like Davy Crockett and Jim Bowie, symbolized the Texan spirit of sacrifice and defiance, bolstering the morale and determination of the Rebel forces.