The American Battle Monuments Commission, established by the Congress in 1923, is an agency of the Executive Branch of the Federal Government.
The Commission—guardian of America’s overseas commemorative cemeteries and memorials—honors the service, achievements and sacrifice of United States Armed Forces. The Commission administers, operates, and maintains 24 permanent American burial grounds on foreign soil. Presently there are 124,909 U.S. war dead interred at these cemeteries, 30,921 of World War I, 93,238 of World War II and 750 of the Mexican War. Additionally 6,177 American veterans and others are interred in the Mexico City and Corozal American Cemeteries.
The Commission administers, operates and maintains 25 memorials, monuments or markers. To learn more about them, click on the Memorials link.
Three memorials in Washington, D. C., also were established by the Commission, but are now administered by the National Park Service. To learn more about these three memorials, click on AEF Memorial, Korean War Memorial, and World War II Memorial.
I found the following entries for CUMPSTONs
William D CUMPSTON Private US Army entered the service from Pennsylvania died 11 July 1944. Buried at Plot D Row 18 Grave 23 Normandy American Cemetery Colleville sur mer Service # 13089796 330th Infantry Regiment, 83rd Infantry Division. Awards: Silver Star with Oak Leaf Cluster
Robert L CUMPSTONE Second Lieutenant, U.S. Army Air Forces Service # 0-763510 73rd Fighter Squadron, 318th Fighter Group. Entered the Service from: Connecticut Died: 8-Aug-44 Missing in Action or Buried at Sea Tablets of the Missing at Honolulu Memorial Honolulu, Hawaii. Awards: Air Medal, Purple Heart