Final answer:
In the Fatherland War, which is another name for World War I, Russia primarily fought against Germany on the Eastern Front. The war led to internal struggles in Russia, culminating in the Russian Revolution and a withdrawal from the war in 1918.
Step-by-step explanation:
The conflict known as the Fatherland War often refers to World War I, implying that Russia fought against Germany. This major global conflict had the Eastern Front, where the Russian army fought against the German and Austrian armies. The Triple Entente, which included Russia, was opposed primarily by the Central Powers, which included Germany. At the same time, the Ottoman Empire sided with Germany, and there were battles between the Russians and Ottoman forces as well.
Throughout World War I, Russia was plagued by internal struggles and a lack of industrial capacity, which contributed to its difficulties in sustaining the war effort on the Eastern Front. The war became deeply unpopular at home, leading to the Russian Revolution in 1917, and Russia eventually signed a peace treaty with Germany in March 1918.