Lenin's journey in a sealed train took place in April 1917 during the First World War. The journey took Vladimir Ilyich Lenin together with other emigrants from Swiss exile through the German Reich via Scandinavia to Petrograd, today's Saint Petersburg. The "sealed train" was only used on the German part of the route. Lenin's arrival in Russia led to the 1917 revolution and the peace treaty between Russia and Germany in March 1918.