The Lakeside Unit, or U.S. Army Base Hospital No. 4, was the first of U.S. expeditionary forces to be sent to Europe after the U.S. entered World War I. The unit was centered in a British army hospital near Rouen, France, and operated from spring of 1917 to the winter of 1918 and 1919.
George Crile (MED 1887), a surgeon and a founder of Cleveland Clinic, served as the unit’s leader.