Geronimo which means "the one who yawns" was a leader and medicine man of the Chiricahua Apache tribe. Geronimo was never a Chief but he led bands of warriors on raids and against the U.S. Army.

He is best known for his ability to evade the U.S. military in his home territory of New Mexico and Arizona. From 1876 to 1886 Geronimo was put on a reservation 3 times, but he broke out each time. In 1886 he surrendered a final time and was sent to a reservation in Florida. Most of the Apache tribe had already been sent to Florida before Geronimo.

Years later Geronimo was sent to Fort Sill Oklahoma where he would live out his life. Geronimo had become a celebrity and attended many events including the 1904 Worlds Fair. Although he was a celebrity he was never allowed to return to his birth land. Geronimo died at age 79, on February 17, 1909. During his years of battle with the U.S. military, his name was greatly feared. Later the military would come to admire this warrior so much that they would yell his name as they charged into battle. This habit of yelling "Geronimo" is still popular today by both military and civilians.

More Info: en.wikipedia.org