RAF Usage
From 1 April 1918 to 31 July 1919, the RAF used the equivalent rank major, which was superseded by squadron leader.
Before the Second World War, a squadron leader commanded a squadron of aircraft. Today, however, a flying squadron is usually commanded by a wing commander, with each of the two flights under a squadron leader. However, ground-operating squadrons which are sub-divisions of a wing are ordinarily commanded by a squadron leader. This includes squadrons of the RAF Regiment and University Air Squadrons.
The rank squadron leader is the first senior officer rank within the RAF.
Read more about this topic: Squadron Leader
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