9. April: With German support, Vladimir Ilyich Lenin travels to Russia

Following the 1917 February Revolution, the German government supports the Socialist exile Lenin in his return to Russia. Once there, he would lead a Socialist revolution and plunge the country into chaos. In return, the German Empire calls for a ceasefire to follow the uprising. Lenin travels in a sealed railway carriage via Germany from Zurich to Petrograd. His October Revolution succeeds in 1917. In March 1918, the German-Russian Treaty of Brest-Litovsk is signed.