Page 3 of German report KUJ-716 at https://catalog.archives.gov/id/131494804 (NARA) with the date of his burial in Florennes as 21 March. Page 2 has 22 March, which seems the correct date.
Last seen between Ostend and Ghent, Belgium on the bomber support mission to Frankfurt, Germany, 20 March 1944. Pilot Robert E. Spencer's body was found near the crash location, near Sart-Saint-Laurent, Belgium. Missing Air Crew Report - MACR 3076.
Equipped with P-51s, the Group entered combat from England in February 1944, flying bomber escort and ground-strafing missions. They took part in the invasion of Normandy, protecting gliders and troop carriers on 6 and 7 June. In September 1944, now...
Military | Second Lieutenant | Pilot | 363rd Fighter Group
Robert Spencer was a Pilot in the 363rd Fighter Group/381st Fighter Squadron. He was flying P-51 Serial #42-102994 on the bomber support mission to Frankfurt on 22 March 1944. His Mustang was last seen between Ostend and Ghent, Belgium. The cause of...
20 March 1944
A force of 594 fighters of types: P-38; P-47 and P-51 are despatched to escort heavy bombers attacking at Frankfurt and Mannheim, Germany. Dispatch summary follows:
Military site : airfield
Originally allocated to the Eighth Air Force as a heavy bomber base, Rivenhall was built during 1943-44 but transferred to the Ninth Air Force before construction was complete. It had three concrete runways, 51 loop hardstandings and two dispersed T2...
Not yet known