WI: A Hot-Headed WW2?

What would happen if the nations during World War Two where far more hot-headed, and completely threw caution to the wind? As in the almost always take massive risks, irregardless of potential backfire?

I could see the Nazis attempting Sealion and failing, Japan attempting to take Darwin and failing, Spain potentially joining the Axis Powers.

What other events would change drastically if the leaders were more hot-headed? How would this affect the outcome of different battles? Would the war last longer or become incredibly short?
 
it is only after his invasion force is defeated on the outskirts of Montreal that Mussolini realizes what Hitler meant by "get those French bastards!"
 
After Brazil's declaration of war, Hitler has the entire U-bootwaffe land a battalion of troops in Rio. They are robbed of all their weapons in two days.
 
France invades Germany in September 1939. Italy attacks France, Tunisia, Greece and Egypt also.
Germany goes through the Ardennes and tries to cut south, behind the Maginot line to cut off the French advance. Things probably bog down as they have too many forces in Poland and not enough ammo?
1940: Britain implements Operation Catherine and invades Norway. The USSR attacks Finland and doesn't stop when they reach Sweden. Operation Pike, Britain and France declares war on Russia.
Germany pre-emptively attacks Russia just as Russia pre-emptively attacks Germany.
1941: Japan goes north and south simultaneously.

So by December 1941:

The fascist block is fighting everyone apart from Japan
The Nordic block is fighting everyone apart from Japan
Japan is fighting everyone apart from the Nordic block
The western block is fighting everyone...
As is the USSR...
 
Spain attempts to reconquer it's colonies. The entire Latin American armies grind Fascist Spain to dust and the Mexican/Argentinian/Peruvian/Chilean/etc flag(s) fly on the King's palace.
 
In the end the World is conquered by the Grand Duchy of Fenwick. Their mighty bowmen destroy tanks, planes, and battleships with one shot.
 
Joint-occupation of Sweden by Germany and Finland.

Mexico decide conquer areas which it had lost about one century ago.
 
Germany invades Switzerland, the Swiss call in all German loans, Hitler has a hissy fit when he's stranded in Stuttgart after his car is repossessed.
 
After Germanys autum 1939 offensive vs France & Belgium is stalemated WWII as we know it becomes ASB territory. Through insanely aggressive offensives Germany collapses in late 1940, France & Britain are exhausted & the USSR supports peoples revolutions & Warsaw & Berlin with the Red Army.
 
What if there were a successful allied offensive September 39. all Nazi aircraft within 150 miles from France hit hard on September 3 at dawn. Tanks and other forces advance strongly
 
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