The Japanese and the internal strife from civil war between Chiang Kai-shek and Mao Zedong .
Germany was Britain's main enemy.
The code that was never broken by the enemy was based on the language of Navajo. Neither the Japanese, nor the German could break the code words. The code was used by people that fought in the Pacific war during world war 2.
there was NO world war 11.
It was the Russians who wanted to start a war
China was invaded, at least in part, by Japan
Germany.
Japan
Germany was Britain's main enemy.
They were not placed anywhere. Japan was not an enemy in World War I.
The question is unanswerable as asked since it does not define who the "enemy" is.
Germany and Japan
I would say Germany. Although Japan was a big enemy.
Japan
Russia.
Japan & Germany .
Their language was indecipherable to the enemy
ASDIC