Brothers in Arms Achievement in Medal of Honor: Warfighter
Brothers in Arms20
Won a round with a Friend as a Fire Team Buddy
How to unlock Brothers in Arms
For this achievement you will have to play online in a Fire Team with someone who is on your friend's list. This achievement isn't too bad, as you must only win the game, and not finish first. Select a game mode like TDM where the games are short, and both teams have a pretty much equal chance at winning.