My claim to Auburn fame...

The following excerpt is from Wikipedia and is considered one of the most credible explanations of the origin of the Auburn battle cry:

"... version of the War Eagle story comes from Indian lore. Legend says "War Eagle" was the name given to the large golden eagle by the Plains Indians because the eagle furnished feathers for use in their war bonnets. The rarest but most historically likely version of the origin of the "War Eagle" cry grew from a 1913 pep rally at Langdon Hall where students had gathered the day before the Georgia football game. Cheerleader Gus Graydon told the crowd, "If we are going to win this game, we'll have to get out there and fight, because this means war." During the frenzy, another student, E. T. Enslen, dressed in his military uniform, noticed something had dropped from his hat. Bending down, he saw it was the metal emblem of an eagle that had been loosened while he cheered. Someone asked him what he had found, and Enslen loudly replied, "It's a War Eagle!" History was made as the new cry echoed throughout the stadium the next day as Auburn battled Georgia."