Quote Originally Posted by katank
Turks etc. have the Middle Eastern halberd miltia which is prefixed by ME heading. These are different from the European halberd miltias (I know EE is for Eastern European, so perhaps WE is for the West European/Catholic ones).

The Catholic ones have spear wall but lower total defence. Middle Eastern ones have better stats but no special formation IIRC.
Generic Halberd Militia are Western European. And it's quite clear from the units entry that they are the only ones who get spear wall, sorry. They have lower defense because they start off unarmored, but you can upgrade them.

On the bright side, Saracen Militia have double the usual spear bonus against cavalry: spear_bonus 8, equal to that of pikemen. Halberds only have spear_bonus 4