well seeing as how this is maybe what, 1914 at the end of the film, then the revolution still has about 5-6 years of factions juggling for power, Juan probably became a Grand Glorious General of the Revolution.
Yeah, I'm pretty sure he continued to "fight for the cause."Did he have any other choice? Sean gave him a royal screwin' and put Juan in a hopeless situation he can't get out of. That's why the message of the film is to not get involved, to hell with the revolution!
I don't wanna be a hero! All I want is the money! The money!!!!