 Complete the following phrase:  He later enlisted in the US Army and as a captain in the Intelligence Division, General Staff, of the American Expeditionary Force, Siberia. He was stationed in Chita and had numerous encounters with Grigory Mikhaylovich Semyonov, the ataman of Baikal Cossacks. Moore was honorably discharged on 17 March 1919. The Emperor of Japan awarded him the Order of the Rising Sun 5th Class for his service as part of the Allied forces in Russia. Moore documented his observations of 