.THE LATEST film in the "Mad Maximum" set, discharged in May, is actually a motorhead's fantasy, having fighters who ride through a post-apocalyptic desert on choppers, Harley Davidsons and dirt bikes. The tactics are improbable, and the violence is actually excessive. However, in recent months one thing not different has actually been actually taking place in Ukraine. For much of the battle Russia has assaulted using standard "combined-arms" tactics: troops advance in armoured motor vehicles, promoted through storage tanks and artillery, then dismount to fight walking for the final few hundred metres. Yet considering that April some Russian troops have been actually attacking on motorbikes. Why?