Engineer and Pioneer Units

[Husaria]

What special powers or capabilities do Engineer and Pioneer units have?

Do they repair railways faster? Build things that I'm not aware of? Help in combat?

Thanks

[czert2]

yes, booth should repair rr faster, while pioneers have pontoner ability + one more (cant recall now), engenirs give + 1 bonus to sieges (booth defending and atacking) and gives bonus to trenches (booth speedbuilding and defence).