The history of the "Geronimo" term is well explained in Wikipedia (of all places!!) In short, it was a cry made by US paratroopers when leaping from the plane during WWII.
https://en.wikipedia.org/wiki/Geronimo_(exclamation)I note, with relief, that the US Army asked permission of the actual (native American) Geronimo's family to use the name on their insignia patch.
David, that is the coolest photo! Nicely caught!
