Does LAD/Ankh create just base soulless, or nation specific soulless?

[Gandalf Parker]

If my old and foggy memory serves (which it often doesnt)
the concept of national undead was kindof added late into the game and has been bit by bit expanded. There are default, then some nations with specific undeads. I think there are still lots of holes in it.

Im trying to remember when the Ankh showed up or if it has always been in the game.