Archival Sources on History of Russia-Polar Bear Project

The following project caught my attention as during the Soviet times considerable attention was paid to an invastion by the ANTANTY of fragile Soviet Russia. At the University of Michigan's Bentley Historical Library there is an interesting digitization project going on. The project website describes it as "American Intervention in Northern Russia, 1918-1919," nicknamed the "Polar Bear Expedition," was a U.S. military intervention in northern Russia at the end of World War I. Since many of these soldiers originated from Michigan, the Bentley Historical Library at the University of Michigan, an archive documenting Michigan history, has collected materials related to this event since the 1960s. The Bentley has amassed one of the largest groups of materials on this topic, consisting of over sixty individual collections of primary source material as well as numerous published materials."(http://polarbears.si.umich.edu/index.pl?node_id=272&lastnode_id=7237)