A tank with Alpha Company, 2nd Tank Battalion, 2nd Marine Division cruises through the muddy field of Landing Zone Flacon aboard Marine Corps Base Camp Lejeune, N.C., during a breaching exercise Oct. 1, 2014. The tanks moved past an obstacle in order to assault a simulated enemy on the other side of that obstacle. The purpose of the three-day field exercise was for the Marines to work on tank fundamentals in the offense and defense.