Rear Shield Protection
Equip your shield and an assault rifle, shot gun, rifle, bazooka or placeable weapons (no handguns, sub machine guns or grenades). As you're firing, turn your back on the enemy as they open fire. The shield remains on your back, deflecting some of the shots coming at you. This works well when you are overwhelmed or when you lack means of cover. This technique doesn't work well against heavy machine gun fire, snipers, heavy soldiers or any soldier with a bazooka. Also since you don't have rations equipped you cannot heal. Get some experience with this technique with the Russian invasion level. Not much of a cheat, but its a good trick to use when you're placing down supply markers or when you're surrounded by enemies.