Just like real soldiers, in America's Army Special Forces you'll have to pass a challenging military training course before your first visit to the battlefield, where you'll face thousands of online adversaries. All of which will be equipped with real weaponry and with a totally realistic way of acting when they encounter you.
The game is really simple to handle, taking into account that you are an elite soldier, but this doesn't mean that you have to shoot at everything that moves, because that would give away your position. You need a strategy, an attack plan and to have chosen the proper weapons. That's the only way to leave the battlefield in one piece.