Who is the winter soldier in avengers cartoon?

The Winter Soldier is Bucky Barnes, Steve Rogers' best friend from childhood. He was thought to have died in battle during World War II but was secretly captured and brainwashed by HYDRA, a Nazi organization. He was turned into a super-soldier and became the Winter Soldier, a deadly assassin who was used to carry out HYDRA's missions. He appears in the Avengers animated series as a member of the HYDRA organization and as a formidable opponent for the Avengers.