Is there any way to apply Hussite tactics of wagons as moveable defensive point? All those Wagon Forts and Gulay Gorods was quite a popular tactics in central and eastern Europe in XV century, as they were cheap, didn't need much training, and their effectiveness was really good.

I'm not sure but units are probably made (as they appear in text files), maybe they appear as rebels (I've never seen but I've never played eastern power that long) and are briberable for eastern fractions (Magyar, Poland, Lithuania, Novogrod, Kiev)... Also - those wagons might work a bit like movable stakes cause bedside ranged units (crossbows, primitive but powerful guns like hand cannons and such) they used stopping power of polearms against cavalry charges (and polearm flails to kill those stopped and downed cavalrymen ).