Secret War Captain America: When Nick Fury discovered that the nation of Latveria was giving super-villains new, high-tech weaponry, he enlisted a team of superheroes to engage in a stealth operation on Lateverian soil. Captain America was among the team's members and he wore a modified, black version of his regular uniform.
Crossbones: In his youth, Brock Rumlow signed up with the Taskmaster's school for criminals, and quickly became an instructor. Recruited by the Red Skull, Brock served the Skull loyally until he was captured and forced to join the Thunderbolts. He recently gained the ability to fire energy beams from his face.