Instead, Russia's failing war effort has raised doubts about Putin's hold on power.
For now, Putin looks secure, but past Russian leaders have suffered at home for blunders abroad.
By the following summer, the Germans had taken huge swathes of Russian-controlled territory and a million Russian soldiers were dead.
Captured Russian soldiers after the defeat at Tannenberg, in present-day Poland, on August 30, 1914.
After an ineffectual troop surge, Gorbachev gave up on trying to improve the situation, and the last Soviet troops left Afghanistan in February 1989.