No. 428 Squadron RCAF
On 7 Nov 1942, he assumed command of No 428 (RCAF) Squadron, standing up the squadron in No. 4 Group. As the OC, it was noted that "Wing Commander Earle was a grand chap, one who can genuinely be called, 'One of Nature's Gentlemen'. He was well liked by the Canadians and sadly missed when he left on promotion to group captain in February 1943. He flew two operations from Dalton, occupying the astro-dome. He had previously been flying Fairey Gordons in the Middle East (Iraq), and found the Wellington difficult, partly due to his eyesight not liking the English skies, and partly as he was not a tall man." After only three months, he left 428 Bomber Squadron (RCAF) as an acting group captain on 7 Feb 1943, when he was assigned as the station commander of RAF Ridgewell and then RAF West Wickham, late in 1943, then as a temporary group captain. He ended the war as Air Officer Commanding No. 300 Group RAF (RAF Transport Command) in Australia.
439 Combat Support Squadron
It was formed as No. 123 (Army Co-operation) Squadron in early 1942 for army training operations in eastern Canada during World War II, being renumbered No. 439 Squadron RCAF in late 1943 when it transferred to England. The squadron briefly flew the Hawker Hurricane before receiving the Hawker Typhoon, flying ground attack missions with the Second Tactical Air Force in support of Allied advances in northwestern Europe from mid-1944 to the end of the war in May 1945.