The largest threats in a "pre-war" is the EMP...America would not be interesting after a "nuclear" bombing as the radiation lasts too long and anyone wanting to "take over" the US would want to keep it functioning as a food and slave production area. Only with an EMP attack could you send troops into and TRY to occupy. No soldier in his normal mind could ever even dream of trying to occupy AMERICA. Too big. Too spaced out cities, Too many armed citizens who will turn into the guerilla warfare fighting machine NOBODY will be able to ever stop. Too large to use gas or chemicals. Too many hiding places in the mountains and too much land to be covered and then the transportation of soldiers, vehicles, spare parts, ammo, food and fuel. Napoleon and Hitler had to learn that the hard way. IF and WHEN all commo is down and no satelites are up to help the modern warfare, then you return to the ONE-ON-ONE fighting Russia did for 10 years in Afghanistan and America has done now for 20 years and did not make any advances, just losses. You can destroy lots of buildings and such, but the farmlands, mountain cabins, swamplands and hidden places in America makes it impossible to totally take over and think you will ever have any type of "peaceful" living place for those attacking and occupying. MAGA, live free, Gary