A phrase that could be compared to that of "Never Forget, (9/11)" In a nutshell, it means, "The
army of Santa Anna (
Mexico) took the Alamo, so we'll take their lives!"
One could use it as a sort of motivation for those around them, when a situation seems hopeless.
It is also a movie, based on the same events surrounding Davy Crockett, the Alamo, and the
Army of Santa Anna.