I had a 150mm rocket FO, I gave him a prep-bombardment order and didn't move any of my troops, 2 companies of infantry and a platoon of PzIV's. The last round of the barrage fell short and landed ON a PzIV. It blew up, all the other PzIV's lost their tank commanders, a couple had damaged guns, and a whole company of my infantry was either dead or routed. The battle was over before it started.