has he been a part of any other war?
Yes - World War II
Interbellum and World War II
In December 1939, soon after the outbreak of World War II, King joined the RAAF as a squadron leader. Initially considered for general flying duties, he was assigned training commands commencing in the new year. 
who is elwyn roy king? A fighter ace in the Australian Flying Corps (AFC) during World War I
Yes. World War II World War II World War II
Elwyn Roy King Elwyn Roy King Elwyn Roy King
Interbellum and World War II Interbellum and World War II Introduction
In December 1939, soon after the outbreak of World War II, King joined the RAAF as a squadron leader.  
In December 1939, soon after the outbreak of World War II, King joined the RAAF as a squadron leader.  He joined the RAAF following the outbreak of World War II and held several training commands, rising to the rank of group captain shortly before his sudden death in November 1941 at the age of forty-seven.
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Elwyn Roy King [SEP] Interbellum and World War II
5 Elementary Flying Training School at Narromine, New South Wales, on 21 December. Promoted to wing commander, he took over No. 1 Service Flying Training School at RAAF Point Cook, Victoria, from Group Captain John McCauley on 7 July 1941. In October, King was promoted to acting group captain and posted to command the newly established Station Headquarters Point Cook.