I already changed it so I have to wait alittle while longer to set it to low, and defcon 5. And yeah I have the same improvements, didn't loose those. Same trading resources as before.
But the thing with the tanks, if some !@#$% bag attacks me again then it will be a total loss before I can even defend myself. I think the war system needs a better upgrade so the defender is not totaly screwed when an attack comes literally out of nowhere.
I lost about $200k that he managed to get from me. But yet I only looted about 15K from him (which I don't understand why I didn't get my money back.