About river crossings pt.2...

[Warhero]

I asked about that tank "thing" in MBT forum (I got responses so "case closed") but now I noticed that in SPWW2 my infantry can't cross river (height -3), especially "premade" map which has river from north to south and just couple of bridges. So, do I have to buy something (rafts or something like that) even for infantry units??? I understand that tanks need barge carriers but infantry... Or is it just "too high" beach to cross river-thing? Sorry if I ask stupid questions but I seldom play river crossing battles and in earlier versions my inf units moved as "rafts" automatically. Now this option seems to be removed or not? Or is this option made only for generated river maps?