Magic in Heroes of Might and Magic V.

Tieru, perhaps the subjugation effect was removed by an attack only in the unpatched vanilla version (I didn't play it). In versions 1.3-1.5 and 2.1, it is not removed by an attack.

I don't remember exactly which version I had for the first five games, but I definitely remember that when attacking, the subjugation effect was removed, just like the blindness effect. It seems like the version Alan was talking about, version 1.3.