No Battalion Wars II is not region locked. My one and only friend code so far is Kenology who lives in the Americas region.
It is a great game, I would reccomend it highly, it seems to me to have a very good learning curve as long as you stay offline until you finish the main game at least (because human opponents who have more experience will generally trounce you)
Also I recently got a star ranking 
Why is it whenever I play a Co-op I get some guy with no experience to help me (thus I have to keep telling them to get specific targets because they only have the right men to do so)
Wheras on Skirmish or Assault I have to play against some 5* general with 100 wins to his name?.... OR even more annoying, 4-5 times I have been pretty sure I could win against someone not so good, yet it disconnects us so neither of us get squat. (And unless there are some hackers it's not simply the person at the other end unplugging because that results in a win for me and a loss for them)
