One hundred years ago, on May 17, 1917, the prominent Russian Social Democrat Leon Trotsky, who actively supported the slogan of the defeat of his government in the world war, returned from America to Russia. En route to the Canadian port of Halifax, he was removed from the ship by the British authorities and placed in an internment camp. The British feared that Trotsky's arrival might destabilize the situation in Rossim. However, soon, at the written request of the Provisional Government, he was released as a well-deserved fighter against tsarism. Directly from the Finland Station, Trotsky went to a meeting of the Petrograd Soviet and was immediately introduced into its composition.