The Germans opened an Eastern front when they attacked Russia.
Russia, Austria-Hungary, and Germany fought on the Eastern Front
Russia
The Eastern Front was the front where Russia fought Germany and Austria-Hungary, beginning at the Russo-German border.
Russia.
The Germans and the Austro-Hungarians against the Russians. The Eastern Front was dissolved after Russia's 1917 surrender.
Eastern Front
Russia
RUSSIA
Russia
Germany was able to defeat Russia on the eastern front because it had knowledge of the Russian army. With this knowledge they were able to know what the Russians were doing and plan accordingly.
Germany and Russia