Though it does not precisely qualify, shadows attacked allies. Those sufficiently influenced by ghosts attacked allies who tried to convince them they were not real. Memory loss due to events on Cahypdo resulted in hostilities. Overgrowth has reduced at least one ally to a mindless husk that had to be destroyed.

This is in addition to the war on Nastrandir, and what has occurred with you.

(Murdered, stabbed by Shepard, multiple fights, caught in a trap and tormented ... Legion has experienced so much bullshit.)