Your Loadout for a Red Dawn Style invasion.

[ManiacallyChallenged]

I'll agree with the brute force of the IED.
The ultimate fire and forget weapon, you place it and leave. It will wait as long as it has to.
As scary and sad as the situation is with our soldiers facing those, I have to be a little impressed. Just like the Japanese in WW2, and the US in the revolutionary war, tactics that are unorthodox can do real damage.