What are conditions when river crossing penalty applies / not aplies?
I had recently lost a battle when my Siberian White forces (8000 man) arrived to region with enemy military control on day 2 in offensive postiure and on day 4 they were attacked from behind the river of 40000 strong Red force in defensive posture and my forces were crushed.
After checking battle log I noticed that river crossing penalty was not applied to enemy forces at all. Red army didn't have marines to reduce the river crossing penalty.