When America entered World War II after the bombing of Pearl Harbor in December 1941, Captain America and Bucky abandoned their military identities for most of the war to devote their full energies to serving as costumed freedom fighters. They soon found themselves allied with the Sub-Mariner, the original Human Torch, and his young mutant partner, Toro, in a team that Winston Churchill dubbed the Invaders. Bucky served Captain America and the Invaders capably and faithfully, leaving the team only temporarily in 1942 to organize and lead his own team of teenage soldiers, the Kid Commandos. Once, to rescue the Invaders from the Red Skull, Bucky assembled a team of costumed super-humans who operated on the home front, a group that would remain together until the end of the war and was known as the Liberty Legion. He also worked with another group of teenagers, the Young Allies.
