415th Night Fighter Squadron (USAAF).
documentedmilitary_installationScandinavian "ghost rockets"
The USAAF night-fighter unit (based near Dijon, France) that named and most-reported the foo fighters over Europe in 1944-45.
The naming unit; its intelligence officer forwarded ~14 incidents up the chain (XII TAC -> SHAEF -> British Air Ministry), yielding only the inconclusive 1945 assessment.