Battle of New York

Loki arrived on Earth from a different dimension two days before the battle to take the Tesseract, with help from Thanos and The Other.

Loki took control of the minds of Clint Barton for his fighting skills and Erik Selvig for his knowledge of the Tesseract. Loki, Barton, and Selvig then escaped as the portal Loki used collapsed and destroyed the facility. Nick Fury told the rest of S.H.I.E.L.D. that a war had just begun. Loki, barton and selvig escaped in a truck.