Consider, however things like supply chains, our dependence on just-in-time inventories and the transportation networks that cannot fail to keep them going. Infrastructure disruption - power, water, telecom - are all vulnerable. Let your imagination be your guide. Do what needs doing and KTF.
There are over 6 million people in the Baltimore/Washington metro are and thanks to just in time delivery probably not two weeks worth of food, maybe less. Move up the coast and the urban density only gets worse. It would not take a real major disruption for those places to descend into total anarchy. Many of them are most the way there already with the grocery store shelves full. Situation is similar on the west coast only their food supply lines are much shorter. Their major weaknesses are water and electricity and natural gas.