Mainly because Napoleon ordered them to.
His decision to invade Russia
His decision to invade Russia -Apex answer.
Napoleons army?
Japan has not tried to invade Russia. However, they did try to invade Mongolia which is bordered by Russia. The invasion was stopped by the Russian army.
It was the Army used to invade Russia.
scorch earth policy
They were both beaten by the Russian winter.
Russia
No. The Germans invaded Russia.
Winter came and Napoleon's army was not prepared for it.
the invasion of russia !
No. His invasion was intended to punish them for not complying with the Continental System.