While Switzerland remained neutral during World War I, three of its citizens served in other nations' air forces and becameflying aces.

• Alfred Michael Koch – 10 confirmed aerial victories while serving in theRoyal Flying Corps andRoyal Air Force.^[1]
• Marcel Bloch – 5 confirmed aerial victories while serving in the FrenchAéronautique Militaire.^[2]
• Jacques Roques – 5 confirmed aerial victories when serving in the FrenchAéronautique Militaire.^[3]

Notes

Bibliography

• Franks, Norman & Bailey, Frank W. (1992).Over the Front: A Complete Record of the Fighter Aces and Units of the United States and French Air Services, 1914–1918. London, UK: Grub Street.ISBN 978-0-948817-54-0.
• Franks, Norman; Bailey, Frank W. & Guest, Russell (1993).Above the Lines: The Aces and Fighter Units of the German Air Service, Naval Air Service and Flanders Marine Corps 1914–1918. London, UK: Grub Street.ISBN 978-0-948817-73-1.
• Shores, Christopher F.;Franks, Norman & Guest, Russell F. (1990).Above the Trenches: a Complete Record of the Fighter Aces and Units of the British Empire Air Forces 1915–1920. London, UK: Grub Street.ISBN 978-0-948817-19-9.

• Swiss aviators
• Lists of World War I flying aces
• Lists of Swiss military personnel

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