Quick Run down of the Players:
France has had a royalist revolution; since there was no "official" flag for France before the Revolution, i used the naval jack as a stand-in.
Empire of Mexico. They're CSA allies ever since the CSA saved Maximiliano of Hapsburg from defeat by Republican Troops.
Republic of Quebec. Gained it's independence in WWI when the US invaded and Occupied Canada. Currently is neutral in WWII; but was heavily involved in WWI. It remains to be seen if they'll get into WWII (one more book to go)
Mormon Flag.
They're currently in a guerilla war/uprising/rebellion against the US.