This note highlights an episode in the fairly recent history of military mapping and charting for which the post First World War requirement for civil aeronautical charting was the catalyst. The tremendous growth of military aviation in the First World War and the need for Aeronautical Charts in the post-war period had resulted in the subject being addressed at the Peace Conference. In an Annex dated 10 April 1919, (1) entitled “International Aeronautical Maps and Ground Markings”, and referring to Clause 2 to Article 13, it was stated that international maps should be made and aeronautical ground marks established in accordance with certain principles.