1914–1918 Served in France, until he was taken prisoner in March, 1918.
14 May 1915 Temporary Commission Lieutenant RAMC.
1915–1916 RMO 4 Bridging Train Royal Engineers France.
14 May 1916 Captain RAMC.
Mar–Dec 1918 Prisoner of War in Germany.
15 May 1919 Demobilised. Soon after he was repatriated he relinquished his temporary commission in the RAMC.
11 June 1920 Rejoined with a Permanent Regular Army Commission Captain RAMC.
1920–1923 Served in Jamaica.
1924–1927 Served in West Africa.
10 June 1928 Promoted Major RAMC.
Malta 10 May 1929 Arrived from England.
Malta 25 Aug 1929 Left for Palestine.
Malta Sept 1930 On duty at Malta.
Malta Oct 1931 Returned for duty from Leave in England.
Malta 1932 On garrison duty.
Malta 1933 On garrison duty.
Malta 8 May 1934 Left for England and thence to Egypt.
Sept–Nov 1939 Served in Palestine.
2 Jan 1940 Acting Lieutenant Colonel RAMC.
1940 Commanding Officer 16 Casualty Clearing Station.
2 Apr–26 Nov 1940 Temporary Lieutenant Colonel RAMC.
1941–1942 Assistant Director of Medical Services HQ 87 Lines of Communication Sub Area Middle East Force.
3 Apr 1942 Died in the Middle East on Active Service. Buried at Aleppo War Cemetery Syria.
5 Aug 1944 His son Peter Colin Charles Gibson died on active service and lies buried at Taukkyan War Cemetery Burma.