There's nothing to activate there, Operation Firestorm didn't have a banner you could set or activate.
You either have accomplished the challenge and gotten the appropriate challenge medal or not. If you're sure you accomplished the challenge and didn't get any rewards (commendation pack or medal) then read the sticky I linked...
Listen I log into the game and I'm going to go to the multiplajer Challenge and there has not been activated in the N7 Day Alliance Challenge ( Operation Firestorm) advise you not to do it is to share!!
There's nothing to activate there, Operation Firestorm didn't have a banner you could set or activate.
You either have accomplished the challenge and gotten the appropriate challenge medal or not. If you're sure you accomplished the challenge and didn't get any rewards (commendation pack or medal) then read the sticky I linked...
