.THE MOST UP TO DATE movie in the "Mad Maximum" set, launched in May, is actually a motorhead's imagination, having warlords that ride through a post-apocalyptic desert on choppers, Harley Davidsons as well as dirt bikes. The methods are unlikely, as well as the violence is actually extreme. Yet in recent months something certainly not dissimilar has been taking place in Ukraine. For a lot of the war Russia has struck using standard "combined-arms" techniques: troops progress in armoured cars, advocated through containers and artillery, after that dismount to eliminate walking for the final handful of hundred metres. Yet since April some Russian troops have been striking on motorbikes. Why?