“Most of the military equipment is EMP hardened. So they would be able to provide some emergency services right away. “
They don’t have the supplies to make it last. ie they can meet their own needs- Food. fuel. but ...
Service members will also be concerned about family members at home but can’t reach cuz the lines are dead at the family end.
The military will be our only non-self-served hope for social order. But they cannot be our grocery store.
For instance there is no way the soldiers posted at Fort Benning could serve the needs of MEtro Atlanta, or even Columbus.
After 4 days there’s no fresh water in Atlanta (save the creeks and rivers.) There’s no food after 10 days. There’s no fuel, no lights at night; no police or fire response. The lords of the flies will emerge rapidly in Atlanta and the US Army cannot stop it.
The military will likely welcome encountering local well-regulated militia who are maintaining local order and securing the peace.