In April 1917, as the Russian Tsar Nicholas II’s abdication sent shockwaves across war-torn Europe, the future leader of the Bolshevik revolution Vladimir Lenin was far away, exiled in Zurich. When the news reached him, Lenin immediately resolved to return to Petrograd and lead the revolt. But to get there, he would have to cross Germany, which meant accepting help from the deadliest of Russia’s adversaries. Millions of Russians at home were suffering as a result of German aggression, and to accept German aid - or even safe passage - would be to betray his homeland. Germany, for its part, saw an opportunity to further destabilize Russia by allowing Lenin and his small group of revolutionaries to return.