I do not 'Prep' for a war, civil or international. If that happens it is likely war will last longer than most preppers could survive.
I do prep for disasters like tornado, flood, etc. Short-Term (4-8 wks.) problems that cause one to lose power, possibly clean water, etc. These are survivable without spending thousands of dollars. Some canned foods, and dried beans and rice. Canned water that can last for a long period of time, plus water filters and purification tablets. Small generator and some gas, Flashlights, Radio, candles, lantern, w/fuel, cook stove, first aid kit, blankets, TP, Meds., etc. etc,