World War I was a global war fought on multiple continents with several nations involved. Over four million men and women served from the United States.
?availability=Family%20History%20Library Eden Putnam, comp. and ed. "Report of the Commission on Massachusetts' Part in the World War.'' 2 volumes. Boston: Commonwealth of Massachusetts, 1931. FHL 974.4 M2pe]
*[https://archive.org/details/goldstarrecordof01mass Report of the Commission on Massachusetts' Part in the World War, volume I]