armored army fighting germany half-track Hanomag metal military nazi onderkraftfahrzeug panzer SdKfz 251 steel vehicle war amunition artillery attack bomb bombshel bullet danger explosion explosive heavy misfire missile rust rusty weapon armor armour armoured Camouflage car carrier gun machine shield shields shoot tank transporter travel turret wheels barrel cutout fire german gunnery history howitzer isolated light ordinance ordnance shooting shot wheel british cannon armor-piercing armour-piercing flak heavy artillery aircraft airplane corsair F4U F4U-1A Corsair warbird wwii