Hitler did not want to fight a two-front war and he didn't intend to be in that situation. It happened because he could not conquer Russia and his troops were tied down in a long struggle that required a long supply line to reinforce it. This gave time for the remaining Allies to land in France and start the second front.
It forced the Germans to fight the war on two fronts.
The U.S. did not fight a two front war in WW1. It fought only on the western front.
Mobilise thus meaning Germany had to fight the war on two fronts
germans
the germans, for about 3 weeks
The Germans in Europe and the Japanese in the Pacific
It opened up another front in the war, and caused the Germans to fight a three front war, which is a logistical nightmare for any military force.
It forced the Germans to fight the war on two fronts.
Russia to the East, France to the West
The U.S. did not fight a two front war in WW1. It fought only on the western front.
All of it. The germans started it with Hitler.
Most fought against the Ottoman Empire on the Middle Eastern Front or the Germans on the Western Front.
Germans
Germans
Germans
Non-aggression pact with Stalin
Soviet (Russian) troops were primarily engaged fighting the Germans along the eastern front and into Berlin.