Gundam Wing Episode 34

Heero resumes his fight at Luxembourg and manages to get to the castle when Treize is under house arrest. He meets with Treize, training a gun on him. Treize tells Heero to kill him, but Heero can't bring himself to do it. He tells Treize he should be doing something to stop Romefeller. Treize says that he doesn't plan to do such a thing and that his war is over. Heero disagrees, pointing out all the soldiers who are fighting for him. Treize says he has something that will show Heero which direction to take in life, and then shows him Epyon, a mobile suit designed and built by Treize that employs the same Zero System that Wing Zero does. Treize tells Heero that it will show him his future and suggests he take it out for a spin. Heero takes Epyon into the battle for Luxembourg and destroys the Romefeller's forces but then the Zero System gets to him and he sees anyone who is fighting that day as his enemies, so he destroys the pro-Treize forces as well. Coming to, he sees the slaughter he's created and gets sick, then heads back to the castle. Treize tells him that it's time that they both die, and hands him a revolver, but Heero collapses in front of him.

Meanwhile, in space, the Tallgeese deploys from Peacemillion and attacks a group of OZ forces that are about to destroy the Wing Zero. In order to get rid of them, he has to abandon Tallgeese and send it into the middle of them to self-destruct. Then he gets into Wing Zero, and the remaining OZ officer detonates the charges on it. Of course, Zero survives the blast - this is an advanced-level gundam we're talking about - and Zechs goes on to destroy the remaining forces in the area. Howard remarks as he sees this that because Zechs is "the epitome of what a soldier should be" that he should have no problems with the Zero System.