In Captain America: Civil War, many of the Avengers adventures go too far, costing more innocent lives. With the Avengers divided over the Sokovia Accords, Zemo uses this to his advantage and frames Bucky/The Winter Soldier as a terrorist. Controlling Bucky with code words, Zemo continues to drive a wedge between Captain America and Iron Man until they finally duke it out at the end. Zemo’s ultimate goal is to break them up entirely. By the end, he’s arguably successful.