Interesting set of articles. Bosnia suffered from "ethnic cleansing" between religious groups, which is how people got trapped inside sectors or inside cities. European wars are not really comparable to the USA, but the situations the writer found himself confronted by are universal.
Notice the emphasis he places on being armed with guns and ammo - in a world ruled by force this is invaluable advice. The risk of being killed by snipers is also worth noting - huge issue in cities, and a lesser problem in the countryside as well. Being able to move at night is crucial to avoid being shot.
The issues with personal hygiene, sanitation, fresh water, and the value of toilet paper, along with the need for antibiotics and disinfection supplies are especially worthy of consideration and planning for. The needs for those with babies in diapers, and feminine hygiene, which are not discussed, are considerations as well, if you need to take such issues into account....
Notice how quickly he traded gold for ammo. And how barter items were needed - knives, lighters, fuel, TP, etc.
This also shows how quickly available resources get consumed near population centers. Wood for fires was gone in the first two months. Eating pigeons and rats....
If you are a city dweller, you need to evacuate before it all goes to Hades in a hand basket....