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.
No. 664 Squadron RCAF
In January 1945, the squadron was deployed to RAF Penshurst, deploying to the Netherlands in March 1945. The squadron flew its first operational sortie over the enemy front in the Netherlands on March 22, 1945. The principal aircraft flown in action was the Taylorcraft Auster Mk. IV and V. After V-E Day on May 8, 1945, the squadron was tasked with flying mail and passengers for First Canadian Army. The squadron continued flying like duties for the Canadian Army Occupation Force (CAOF) until the spring of 1946. 664 (AOP) Squadron, RCAF, was disbanded at Bad Zwischenahn, Germany, on 31 May 1946. The squadron had no motto or heraldic badge assigned to it.