[shadowprofile76]

I would add Nazi Germany to that little list. Their declaration of war on the United States in December of 1941 was flatly suicidal (already fighting Russia where they had lost the initiative, and already in a two front European war due to the continued presence of England) But declare war they did anyhow and not only was the Third Reich dismantled, it was flat out devastated and incinerated with several million deaths. Germany suffered the second highest death toll of any country in the European theater of war, and all this was allowed to suicidally happen despite every single one of Hitler's generals and most of the top Nazi party bosses completely knowing that their leader's decision in late 1941 was guaranteed to destroy them. They just went along with it though.

Churchill rather typically stated it most succinctly: When presented in late 1941 with the report of Hitlers declaration of War on the U.S he said (paraphrasing a bit from memory on the literature) "So then we do win this war after all.."

As for Japan, SOME of the top people in the government and military knew they were committing slow suicide with their attack (Yamamoto for example, thought it was complete idiocy to fight the U.S) but there were enough fanatical believers to push through their idea that if they could just get the upper hand on the U.S in a preemptive naval/air war in 1942, they might secure peace for their Asian conquests.