The Kerensky Offensive provoked discontent among soldiers in Petrograd which triggered a Bolshevik uprising against the Provisional Government. The uprising was put down and evidence was made public that the Bolsheviks were being supported and funded by Germany.
With the Bolsheviks relentlessly criticizing the Russian government, the question of war aims came to the fore. When the liberals in the government couldn't give a straight answer, a cabinet shuffle followed, giving socialists more power than before.
The Russian Provisional Government had declared a political amnesty that allowed political exiles to return home, notably Leon Trotsky and Vladimir Lenin, who got an assist from the German government.
The US entered the war in early 1917, but it would take time for her to have an impact on the war. Brazil also joined the war in 1917, and in Canada, the political fight over conscription leads to a divisive general election.
By 1917, many in German and Austrian official and military circles had given up hope of winning the Great War on the battlefield and were ready to discuss peace terms. Hindenburg and Ludendorff, however, insisted that victory was at hand.
With Russia in disarray, and the Eastern Front in a de facto armistice, we shift our attention to the West, where the French begin the latest "final" offensive.
Russia's allies--The United Kingdom, France, Italy, and now the United States--were pleased that Russia was taking a more liberal and democratic direction, but they also expected Russia to honor the commitments the czar had made to them, even though those commitments were unpopular at home. Meanwhile, the new government struggled even with its most basic responsibilities.
Even the resumption of unrestricted submarine warfare by the Germans was not enough to push Woodrow Wilson into supporting war, but the Zimmerman Telegram made it impossible to oppose war any further. Additionally, the Russian Revolution eliminated an unsavory ally, replacing him with a fledgling democracy that needed support.
The revolutionary upheavals in Petrograd lead to the formation of a Provisional Government. Emperor Nikolai II abdicates, ending the 304-year old Romanov dynasty.