Forever frozen in time, the mare struggles up a steep incline in her ill-fitting tack and pack saddle. Her head bows, and her tail lifts in the wind. Strapped to her back are four canisters of live explosives. The life-size bronze statue is called The Uphill Battle, and Staff Sergeant Reckless, the mare it depicts, was a United States Marine. The 10-foot-tall, 1,200-pound equine monument sits at the end of a corridor of trees in the Semper Fidelis Memorial Park of the Marine Corps Heritage Center in Triangle, Virginia. Created by…