Josef Jacobs was a German fighter ace of the First World War, credited with 48 confirmed and 12 unconfirmed aerial victories.

List of victories

This list is complete for entries, though obviously not for all details. Background data was abstracted from Above the Lines: The Aces and Fighter Units of the German Air Service, Naval Air Service and Flanders Marine Corps, 1914–1918, , p. 136, and from The Aerodrome webpage on Jacobs Additional sources are as noted. Abbreviations from those sources were expanded by editor creating this list.

No.Date/timeVictimSquadronLocationRemarks Assigned, Flieger-Abteilung 11, 3 July 1915 Unconfirmed 1 February 1916 Voisin Unharmed aircrew in undamaged Caudron G.4 at "crash site" Transfer, to Fokkerstaffel West 1, or 22 March 1916 Observation balloon Debatable first victory 1 12 May 1916 Enemy aircraft Debatable first victory Transfer, to Jagdstaffel 22, 18 January 1917 2 23 January 1917 Caudron R.4 Terny-Sorny, France 3 9 February 1917 @ 1635 hours French two-seater Cerny, Essonne, France Unconfirmed 6 April 1917 @ 1930 hours Observation balloon 21st Company Blanzy-Vailly 4 13 April 1917 @ 1955 hours Farman Barisis, France 5 16 April 1917 in the pm Observation balloon Laffaux, France Unconfirmed 7 May 1917 SPAD Braye Unconfirmed 28 May 1917 Nieuport Unconfirmed 26 June 1917 SPAD Pontavert, France Unconfirmed 27 June 1917 SPAD Cerny, France Unconfirmed 6 July 1917 SPAD Unconfirmed 28 July 1917 @ 0705 hours SPAD Near Craonne, France Unconfirmed 28 July 1917 @ 1200 hours SPAD Near Soissons, France Transferred, to Jagdstaffel 7 6 20 August 1917 @ 1735 hours Sopwith Triplane No. 10 Naval Squadron Langemark, Belgium 7 10 September 1917 @ 1905 hours SPAD Escadrille SPA.48, Service Aéronautique Ace Jean Matton killed in action 8 11 September 1917 @ 0830 hours Sopwith Camel Koekost 9 18 October 1917 @ 0950 hours Airco D.H.4 Zillebeke Lake, Belgium 10 9 November 1917 @ 1530 hours SPAD Escadrille SPA.103, Service Aéronautique Woumen, Belgium 11 6 December 1917 @ 1035 hours SPAD No. 23 Squadron RFC Passchendaele (Passendale), Belgium Unconfirmed 8 December 1917 @ 1355 hours Sopwith Camel Passendale, Belgium 12 18 December 1917 @ 1545 hours Sopwith Camel No. 65 Squadron RFC Diksmuide, Belgium 13 11 April 1918 @ 1805 hours Royal Aircraft Factory R.E.8 No. 7 Squadron RAF West of Ostend, Belgium 14 21 April 1918 @ 1115 hours Sopwith Camel No. 54 Squadron RAF South of Armentieres, France 15 14 May 1918 @ 1640 hours Observation balloon 27th Company North of Ypres, Belgium 16 14 May 1918 @ 1645 hours Observation balloon 50th Company Northwest of Ypres, Belgium 17 23 May 1918 @ 0940 hours Royal Aircraft Factory SE.5 Kruisstraat, Belgium 18 1 June 1918 @ 0740 hours Bristol F.2 Fighter No. 20 Squadron RAF Northwest of Dikkebus, Belgium 19 5 June 1918 @ 1120 hours Sopwith Camel No. 203 Squadron RAF West of Bailleau, France 20 10 June 1918 @ 0845 hours Sopwith Camel South of Poperinge, Belgium 21 19 June 1918 @ 2025 hours Royal Aircraft Factory R.E.8 No. 21 Squadron RAF East of Zwartelen, Belgium 22 26 June 1918 @ 2015 hours Sopwith Camel No. 210 Squadron RAF Menin (Menen), Belgium 23 17 July 1918 @ 2110 hours Sopwith Camel Southwest of Nieuwpoort (Nieport) 24 19 July 1918 @ 0930 hours Royal Aircraft Factory SE.5a No. 74 Squadron RAF Moorslede, Belgium 25 13 September 1918 @ 1500 hours Royal Aircraft Factory R.E.8 Between Kemmel, Belgium and Bailleul 26 15 September 1918 @ 1900 hours Armstrong Whitworth F.K.8 No. 82 Squadron RAF Passchendaele, Belgium 27 16 September 1918 @ 0840 hours Royal Aircraft Factory SE.5a No. 29 Squadron RAF West of Menen (Menin) 28 16 September 1918 @ 1935 hours Observation balloon Poperinge, Belgium 29 19 September 1918 @ 1900 hours Sopwith Camel 30 21 September 1918 @ 1210 hours Airco D.H.9 No. 107 Squadron RAF Diksmuide, Belgium Unconfirmed 21 September 1918 @ 1222 hours Airco DH.9 Northwest of Roeselare (Roulers), Belgium 31 24 September 1918 @ 1835 hours Sopwith Camel No. 204 Squadron RAF Between Diksmuide and Moorslede, Belgium 32 28 September 1918 Royal Aircraft Factory SE.5a No. 41 Squadron RAF Moorslede, Belgium 33 28 September 1918 Royal Aircraft Factory SE.5a No. 41 Squadron RAF Moorslede, Belgium 34 1 October 1918 Airco DH.9 35 2 October 1918 Airco DH.9 Stadenberg, Belgium 36 2 October 1918 @ 1032 hours SPAD Houthulst Forest, Belgium 37 3 October 1918 Sopwith Camel Rumbeke, Belgium 38 3 October 1918 Sopwith Camel Rumbeke, Belgium 39 4 October 1918 SPAD 40 7 October 1918 Sopwith Camel Either No. 70 Squadron RAF or No. 65 Squadron RAF 41 8 October 1918 Observation balloon Kemmelberg, Belgium 42 9 October 1918 Observation balloon Southwest of Diksmuide, Belgium 43 9 October 1918 Observation balloon Southwest of Diksmuide, Belgium 44 14 October 1918 Sopwith Camel 45 15 October 1918 Breguet 14 North of Wervik (Wervicq), Belgium 46 19 October 1918 @ 1130 hours SPAD Escadrille Spa.82, Service Aéronautique Wijnendale, Belgium 47 19 October 1918 SPAD Escadrille Spa.82, Service Aéronautique 48 27 October 1918 Bristol F.2 Fighter

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