Which front experienced significant internal turmoil within the country that influenced World War I?

• A. The Eastern Front.
• B. The Western Front.
• C. The Southern Front.
• D. There was no internal turmoil affecting WWI on any front.

Answer: (A)

Internal upheaval within a belligerent nation can drastically change how a front fights and the overall course of a war. The Eastern Front is the one where this happened in WWI because Russia experienced the 1917 revolutions that toppled the Tsar, brought the Bolsheviks to power, and ultimately led to Russia exiting the war after the Treaty of Brest-Litovsk in 1918. This collapse of Russian participation reshaped the front lines and the balance of forces on the battlefield. The Western Front did not undergo a comparable national revolution that altered its war effort, and while the Southern Front faced its own pressures, they did not translate into the same scale of internal political upheaval.