Serbian Air Force pilot badge. || The Serbian Air Force was established in 1912, and the country was one of the first 15 states in the world to have an air force. In the First World War, the Serbian Air Force operated in Serbia and, later, the Salonika Front, where they fought alongside their comrades in the French Air Force. Serbian Air Force pilots wore this French-made (by 'Bizu Fix'), pilot's badge over their left breast pocket. Official regulations did not cover the wearing of this badge, but there are various photographs of Serbian pilots wearing this badge, and pilots would even sometimes wear a mixture of clothing in their missions that weren't official, regulation wear. The Serbian Air Force performed the first medevac (medical evacuation) operations in aviation history in November 1915 when they took wounded soldiers from Serbia to Corfu by air for medical treatment. The Serbian Air Force flew several thousand air sorties at this time and, it wasn't just the air that enemy pilots would have to watch out for, as the first ever shooting-down of an airplane in history by ground-based anti-aircraft (AA) fire was performed by the Serbian Army on 30 September 1915, with a dedicated AA unit which was part of an artillery regiment, over Kragujevac, Serbia. Today, the event is commemorated by the Serbian Army as the Day of Air Defense Artillery Units.

Daniel Joseph Sheehan, (1894–1917) 2nd Lieutenant Royal Flying Corps (RFC), was the eldest of three sons of Captain DD Sheehan MP, all of whom served with him on the Western Front during World War I. Photograph shows him in Cork while on home leave in 1916. He was educated at Christian College, Cork, and Mount St. Joseph's College, Roscrea and played for Munster two years in the Senior College Inter-Provincial Rugby Championships when considered the best three-quarter back in Ireland. He joined the Devitt and Moore's Ocean Training Ship ''Medway'' as a Cadet in 1912, winning first prize for Navigation and General Seamanship. He transferred to HMS ''Hibernia'' as midshipman R.N.R. (Royal Navy Reserve), for training with a view to a permanent commission in the Royal Navy. After serving with the 3rd Battle (naval) Squadron in the North Sea, on the outbreak of World War I in 1914–15, he transferred to the Royal Naval Air Service (RNAS), obtaining his aviator's certificate in 1915. He was wounded while flying in Belgium, and, being regarded as unfit for further service with RNAS, received permission to transfer to the Royal Flying Corps. He was engaged for a time as an instructor at Oxford, England, then went on active service again in 1917 with the British No. 66 Squadron in France. He died on 10 May 1917, when on a scouting expedition, a superior body of enemy aircraft engaged the British battle-plane, and Lieut Sheehan and another officer were killed. His superior officer wrote: he was loved by all and was by nature absolutely devoid of fear. His biography as first printed and published by His Majesty's Stationary Office London, 1921 publication: Officers Died in the Great War 1914-19. He was buried at the Commonwealth War Graves Commission's Cabaret Rouge Cemetery (grave plot N16) at Souchez (14 km. north of Arras, sw. of Lille), France.

Martin Joseph Sheehan (1896–1918) was Second Lieutenant with the Royal Munster Fusiliers (RMF), subsequently with the Royal Air Force (RAF) when killed on the Western Front. Photograph shows him on home leave in Cork, 1917. He was the second of three sons of Captain DD Sheehan MP for mid-Cork, Ireland, who served with him on the front. Martin was born in Tralee and educated at Christian College Cork (city) and Mount St. Joseph's College, Roscrea. He won several prizes in school sports and played for Munster in the Rugby Inter-Provincial Senior College Championships, being described in the Dublin Press as 'the most brilliant three-quarter back the College had produced for years'. He went to Canada in 1913, and was employed in the Union Bank of Canada at Bellevue, Alberta. He joined the Canadian Expeditionary Force as a private in 1915 and won the all-round Athletic Championship of his Division in Nova Scotia. He came overseas with his battalion in 1916, transferred as a cadet to the RMF and later obtained his commission. With them he was in some of the fiercest fighting at the Third Battle Passchendaele and elsewhere. He transferred to the RAF No. 13 Squadron as 'Observer' and saw considerable service in France and Italy. He went out on observation duty over the enemy lines on the morning of 1 October 1918, and met his death, but in what circumstances has never been known. His biography as first printed and published by His Majesty's Stationary Office London, 1921 publication: Officers Died in the Great War 1914-19. See also http://www.theaerodrome.com/forum/516019-post2.html Link to recorded details. It is most probable that the aircraft was brought down by ground fire. http://www.greatwar.co.uk/research/military-records/ww1-war-dead-records.htm He is buried in the Commonwealth War Graves Commission's Anneux British War Cemetery, near Cambrai, France; grave no.: Plot 1, Row H21. Details from link: http://www.cwgc.org/search/casualty_details.aspx?casualty=188154 Casualty details—Sheehan M J.