That song was a marching song, sung by the revolutionaries during the last Mexican Revolution. The last time I sang it was in Costa Rica the last 1 1/2 miles of a 5 mile walk on the beach, by the light of the full moon, after imbibing waaaaaaay to much scotch. It really helped! I accidently spell-checked this and it didn't recognise imbibing. Must belong to the temperence league!