Don Glory is a professional boxer.
He is very good at his trade, winning fight after fight and gathering a decent reputation and an impressive following. He might have stayed out of his future side business and just kept pounding opponents in the ring if it were not for his fiancée's demand that he stop the fighting.
This is a vital part to the Glory saga and a rather ironic one.
June Brent is the daughter of a very wealthy, indulgent and loving father. She is also very much in love with Glory and her father has no problem with the fact that his future son-in-law makes his living with his fists. Not so with Ms. Brent, however, and when we first meet both Glory and Brent, they had just broken up. Well, she broke up with him. He just got miffed and quite put out, both figurativly and literally.
So, ticked that his gal no longer wants anything to do with him because he had promised to give up fighting and then gotten into the ring again anyways, Glory is wandering down a street feeling sorry for himself when he hears rowdiness from inside a storefront. Curiousity draws him in and he hears an orator calling for the small crowd to force the government to obey the demands of the Fatherland. Glory, already in a rotten mood, takes considerable exception and breaks up the rally with his usual weapons - his fists.
That puts Glory in the mood to take his new activity on the road, fighting the enemies of his beloved country wherever he can find them, at home or abroad.
No one has asked him to take on this task and it does not look like anyone is paying this red-headed pugilist to do this but he loves punching things and walloping denizens of dictatorships and would-be saboteurs and like seems like a great activity.
Meanwhile, Ms. Brent quickly decides that she sees his point of view and realizes that Glory is better off with her in his corner than out by himself. Well, usually.