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.
428th Bombardment Squadron
Activated as a B-25 reconnaissance squadron in early 1942, it was redesignated a medium bomber unit in April. It trained with the Third Air Force in the southeastern United States. It was deployed initially to England in September 1942 and flew some missions under VIII Bomber Command over German-occupied France; attacking enemy troop formations, bridges and airfields. It was part of the Operation Torch invasion of North Africa in November 1942, being deployed to the new Mediterranean Theater of Operations (MTO). It was assigned to the Twelfth Air Force in French Morocco in November. The squadron engaged primarily in support and interdictory operations; bombing marshalling yards, rail lines, highways, bridges, viaducts, troop concentrations, gun emplacements, shipping, harbors and other objectives in North Africa.