The American Expeditionary Force, North Russia (AEF in North Russia) (also known as the Polar Bear Expedition) was a contingent of about 5,000 United States Army troops that landed in Arkhangelsk, Russia as part of the Allied intervention in the Russian Civil War. It fought the Red Army in the surrounding region during the period of September 1918 through to July 1919. History Background U.S. President Woodrow Wilson sent the Polar Bear Expedition to Russia in response to requests from the governments of Great Britain and France to join the Allied Intervention in North Russia (also known as the North Russia Campaign). The British and French had two objectives for this intervention: Preventing Allied war material stockpiles in Arkhangelsk (originally intended for the recently collapsed Eastern Front) from falling into German or Bolshevik hands Mounting an offensive to rescue the Czechoslovak Legion, which was stranded along the Trans-Siberian Railroad On July 14, 1918, the U.S. Army's 85th Division left their training camp at Camp Custer, Michigan for the Western Front in France. Three days later, President Wilson agreed to limited participation by American troops in the Allied Intervention with the stipulation that they would only be used for guarding the stockpiled war material. When U.S. Army General John J. Pershing received the directive from President Wilson, he changed the orders for the 339th Infantry Regiment, along with the First Battalion of the 310th Engineers plus a few other ancillary units from the 85th Division. Instead of heading for France, these units were trained and re-outfitted in England with Russian guns and then sent to North Russia. They arrived in Arkhangelsk on September 4, 1918, coming under British command. (Allied expeditionary forces had occupied Arkhangelsk on August 2, 1918.) See American Expeditionary Force, Siberia for information on the 7,950 American soldiers and officers sent to Vladivostok, Russia at the same time. Expedition When the British commanders of the Allied Intervention arrived in Arkhangelsk on August 2, 1918, they discovered that the Allied war material had already been moved up the Dvina River by the retreating Bolshevik forces. Therefore, when the American troops arrived one month later, they were immediately used in offensive operations to aid in the rescue of the Czech Legion. The British commanders sent the First Battalion of the 339th Infantry up the Dvina River and the Third Battalion of the 339th up the Vologda Railroad where they engaged