1828-1909. He fought many battles against Mexico and the United States as they tried to expand into Apache tribal lands during a several-decade skirmish known as the Apache Wars.
Although it's yet unknown how the code name was chosen, it was fitting for a couple of reasons. Geronimo became legendary for his daring exploits and escapes during battles against both Mexican and U.S. troops -- the raid on bin Laden's compound was considered more daring and risky than simply bombing it. "Geronimo" is also the traditional cry of paratroopers as they leap from a plane -- the Seal team was flown into the compound by helicopter.
Geronimo is not Geronimo's actual name. He was born "Goyahkla," or "one who yawns." The Mexicans named him Geronimo after a battle in which he attacked Mexican soldiers, who were armed with guns, with a knife, causing them to call out to Saint Jerome ("Jeronimo!").
After a life of fighting against the U.S., Geronimo died from pneumonia at age 79 as a prisoner of the United States at Fort Sill, Oklahoma.