The what?

[Isaac shrugs that off after a moment and attempts to provide an explanation.]

I was a State Alchemist. We worked with the military and our orders were to end a war that had lasted for years. We were ordered to kill and there wasn't anything we could do but obey those orders.

[There's silence for a moment before he continues.]

I left after that. I didn't want to be a part of a military that resorted to killing more people than necessary. We could have won the war without murdering everyone. But... There was no point to the war to begin with.

[More silence. Isaac decides against telling Ouka exactly what happened afterwards.]

I was working to stop the military when I found myself here.