36. Ultimates (and friends) vs. The Liberators
In the second volume of Mark Millar and Bryan Hitch’s The Ultimates, there had been a set-up of the Ultimates being set-up, as the evil Loki was helping to manipulate events so that the team would find themselves in disarray, just in time for an invasion of America by a group of super-soldiers from the various countries that President Bush considered the “new Axis” (Iran, North Korea, etc.).
The Ultimates were down and out, but, as they are wont to do, they came back from the dead and put together a defense of America including basically every hero in the Ultimate Universe to save the day.
Loki does not take this well, so he brings down a load of Asgardian bad guys, but Thor responds by bringing in a load of Asgardian GOOD guys and there is an epic (and mostly off-panel) battle and when it is all said and done, the Ultimates are victorious!
However, they do partially agree that their attitude early on in the series, where they were getting involved in foreign countries, WAS over the line, so they split from the United States government and go at it alone (funded by Tony Stark, Iron Man).