Anything and everything that the Axis powers did to bring the US into the war. Jonathan Parshall's "Combined Fleet" page makes a good case that, based on economics alone, the Japanese had no chance of defeating the US.

Why Japan Really Lost The War - Grim Economic Realities

Their only chance was to break our will, and they overestimated their ability to do that by a jug full.

What a waste. What a bloody awful waste.

=====================
Boots were made for walking
Winds were blowing change
Boys fall in the jungle
As I Came of Age