Using the Dominion forces to do the nasty jobs was an Imperial tradition dating back to the First World War. And the Dominions were keenly aware of it. I suspect it was one of the reasons for the recent Canadian draft riots.
Alex Drier’s Weekly News Analysis – March 24, 1945 – Gordon Skene Sound Collection
http://pastdaily.com/wp-content/uploads/2015/03/News-for-March-24-1945.mp3
Soaring to New Heights: Spotlight on the Tuskegee Airmen
332nd Fighter Group: Narrative Mission Report No. 246 (March 24, 1945)
“Narrative Mission Report No. 246” for the mission of March 24, 1945. The mission, escorting the B-17s of the 5th Air Wing on an attack on the Daimler-Benz Tank Assembly Plant near Berlin was one of the longest missions flown by the Fifth Air Force during the war, and the 332nd Fighter Group (Tuskegee Airmen) would later be awarded the Distinguished Unit Citation for its service that day. By the date of the mission, the 332nd Fighter Group consisted of three squadrons, all of which participated. As with most mission reports, enemy fighters were seen but sometimes did not attack. The mission also includes sightings of, and attacks by, Me-262 jet fighters, which drew the attention of Army Air Forces intelligence officers. The report also recorded a tragedy that was all too common in the air war—one of the B-17s was hit by flak near Prague, Czechoslovakia, and spiraled to the ground. None of the pilots of the 332nd saw any parachutes come from the stricken bomber, which would indicate that all crewmembers probably died when their plane hit the ground.