Assassination limit?

[Taqwus]

Are you sure they're not province defense commanders? Those are immune to assassination, after all.

[PDF]

AFAIK the only time assassins don't assassinate is when there is no (more) commanders in the province. But Prov Def commanders aren't killable this way.

[Argitoth]

and just a note: Independence does not have province defence. Those are actual units.

[Yossar]

I think that I've had a scout attack an independent province and seen that there were two commanders. Then I assassinated two commanders, attacked, and had an enemy commander present. That ever happen to anyone else?