I'd say one but I can't decide which side to join with my orc lol
The orcs served in the Legion since the Empire regnoiced them as citizens,just look at some of the non stronghold orcs in Skyrim.The empire also helped them after the 4E sack of Orsinium.
I've only done the civil war once and that character joined the Stormcloaks. I plan to take another character through the Imperial side someday.
The empire and legion in particular has been good to the orcs. Whenever I make an orc character I have him join up with the legion.
Well, the Red Coats tried to behead my Bosmer and would have succeeded if that beautiful black dragon had not rescued her. And the Blue Coats hate elves. So. . . neither side is worthy of support. Besides, both human factions are too foolish, silly or blind to realize that the Thalmor are the real threat.