Here's the description of the spell Animate Dead, from the Cook/Marsh Expert set:
This spell allows the caster to make animated skeletons or zombies from normal skeletons or dead bodies within the range of the spell. These animated dead will obey the caster until they are destroyed or dispelled by a cleric or dispel magic.The spell animates 1 hit dice of skeletons or zombies for every level the caster has. Thus a 12th level magic-user could animate 12 human skeletons or 6 human zombies. Skeletons have AC 7 and the same hit dice as the original creature. Zombies have AC 8 and one more hit die than the living creature had. Character levels are not counted when a character is animated, thus a first level magic-user animated as a zombie will have 2d8 hit points. Animated creatures do not have any spells or special abilities.
SO much simpler than confusing things with Animate Dead Monsters. Just let the necromancer do their thang, man.