The son of Wilhelm Martin and Eliza Johnsen, Olans Charles Wilhelm Johnsen scored five victories flying the D.H.9 with 98 Squadron in 1918.
Appears as Olans Charles William Johnsen in the London Gazette.
London, England, Births and Baptisms, 1813-1906 Record for Olaus Charles Wilhelm Johnson
Distinguished Flying Cross (DFC)
Lieut. (A./Capt.) Olans Charles William Johnsen. (FRANCE)
A brilliant leader and gallant fighter. On 1st October this officer led a bombing formation against a railway junction, and, owing to his skilful leadership, serious damage was caused. Three big explosions occurred in the station, wrecking a number of trucks, and a factory near by was demolished. He has taken part in thirty-four raids, eighteen of which he has led. He has accounted for five enemy aeroplanes.