After the October Revolution he settled in Tyumen. In the winter of 1917 he was arrested and transferred to Yekaterinburg. Three months later, Lvov and two other prisoners (Lopukhin and Prince Golitsyn) were released before the court under a written undertaking not to leave the place. The local war commissar, Filipp Goloshchekin, intended to execute Lvov and the other prisoners, but was ordered not to by Isaac Steinberg, the People's Commissar for Justice, a Left-Socialist Revolutionary while they were still in coalition with the Bolsheviks. Lvov immediately left Yekaterinburg, made his way to Omsk, occupied by the anti-Bolshevik Czechoslovak Legion. The Provisional Siberian Government, headed by Pyotr Vologodsky, was formed in Omsk and instructed Lvov to leave for the United States (since it was believed that this country was capable of providing the fastest and most effective assistance to anti-Bolshevik forces) to meet with President Woodrow Wilson and other statesmen to inform them on the aims of the anti-Soviet forces and receiving assistance from former allies of Russia in the First World War. In October 1918 he came to the United States but was late as in November of the same year the First World War ended and preparations began for the peace conference in Paris, where the centre of world politics moved.