Germany and Japan
The Americas.
Germany.
Democrat
Germany was Britain's main enemy.
Japan
The question is unanswerable as asked since it does not define who the "enemy" is.
The Spanish brought the first major shipment of horses to the Americas in 1493 during Christopher Columbus's second voyage. These horses were part of the Spanish efforts to establish settlements and expand their influence in the New World. The introduction of horses significantly impacted indigenous cultures and transportation in the Americas.
During WW 1, submarines played a major part of a major war for the first time. The role of a submarine was basically to use torpedoes to sink enemy warships and cargo vessels.
Mainly u-boats, other enemy ships and enemy bombers
First Japan in the Pacific and then Germany .
Japan