History
When Loki sent a Troll to wreak havoc on Earth, some heroes, including Captain America, went to the place but were duped and started fighting each other until they realized the deception and teamed up as the Avengers to fight the Trolls and Loki together. Later, at the sound of the alarm at Avengers Mansion, the Avengers had to face Baron Zemo and his Crimebots who had sprinkled the city with glue so that they could rob the city undisturbed.[1]