Carl Wilhelm Kaarsberg is born on 19 June 1904 in Såby, Denmark.
He enlists for the Royal Australian Air Force on 4 September 1942 in Brisbane. He is then living in Maruborough. He is discharged on 4 September 1945 at which point he is attached to No. 88 Operational Base Unit holding the rank of Leading Aircraftman.
Carl Wilhelm Kaarsberg is naturalised on 24 September 1934 and is, thus, a naturalized British subject during the war (www.ww2roll.gov.au; www.naa.gov.au).