Major League Baseball players do what they do for many reasons. They play ball because it’s fun, because it’s a chance to be a kid again. They do it to delight fans, to break records, to win championships. They do it for their livelihoods, for their families, for their hometowns and native countries. But on Sunday, the Atlanta Braves and Miami Marlins will play a historic baseball game at a remarkable American venue, and they’ll do it for another reason that can never be questioned. They’ll play the Fort Bragg Game to simply say, “Thank you.”