Jens Børge Danielsen is born on 3 April 1904. 
He is attached to the air force of DANFORCE, the Danish Brigade in Sweden during 1944-45. He is attached to Flygflottijl 4 Østersund. Though equipped and trained, the force was never in combat and returned to Denmark 12 May 1945 by train.
From May 1945, J.B. Danielsen is attached to No. 3 Squadron, 8403 Disarmament Wing, as liason officer in Vandel Airfield an the Southern part of Jutland. 
- Holm, 1995; Ancker, 2006