In 1942, Germany was fighting a war on two fronts. Which nation was part of Germany's western front?

France.

Explanation:

But the Germans were right about the location of the fighting. Most of it occurred on two fronts in Europe - the Eastern Front and the Western Front. On the Western Front, there was a new strategy of war called Trench Warfare. Hundreds of miles of trenches were dug by both sides along the French/German border.

France was on the western front