Ultimate War #2 (2002)

Ultimates vs Ultimate X-Men
The X-Men are in one of their safe houses, regrouping to track down Magneto. The contingent that went to the Savage Land in "Ultimate X-Men" returns a man short, which does little to help morale. Shortly after that, Magneto attacks the Triskelion, breaking in to punish Quicksilver for his betrayal and to eliminate all information the Ultimates had on the Brotherhood.
Release Date: 2002