Throughout the war, Cap and Bucky fought alongside infantry and with a group of heroes known as the Invaders, as well as other groups of younger heroes. In the closing months of World War II, Captain America and Bucky were both presumed dead in an explosion over the English Channel. It was learned that Bucky was revived and brainwashed by Soviets as the assassin Winter Soldier. With the help of Captain America, he recovered his memory and after the apparent murder of Rogers, Bucky took the mantle of Captain America. Although Steve Rogers returned, Bucky remained as Captain America. After Bucky was almost killed by Red Skull's daughter, he decided to fake his death and secretly return to his role as the Winter Soldier, with his lover Black Widow.
In the heat of World War II, Bucky Barnes gave his life for his country - or so Captain America thought. His frozen body was recovered by the Soviets, who turned him into an unstoppable, fearsome assassin - and their puppet! Freed from Russian control, Bucky now fights on the side of the just and righteous.