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.

With political resentments already high, the deprivations of the harsh winter of 1916-17 cause them to boil over. The Russian Revolution has begun.

When the Great War began, Russian political factions mostly united in a common front to support the war effort, as political parties did in the other belligerent nations. But when Russia's military reversals and shortcomings in leadership became too obvious to ignore, opponents of the government began to speak up.

With the Mexican Revolution winding down and the prospects of war between Mexico and the USA seeming increasingly remote, the German Foreign Secretary explores the idea of inviting Mexico to declare war on the United States.