Dee ihe na-aga n'ihu maka paragraf a - A na-ebufe Belgian S.73s asaa na United Kingdom na May 1940 ma na-arụ ọrụ site na Royal Air Force, na, nke ndị ọrụ ụgbọ elu SABENA na-arụ ọrụ, na-eji ụgbọ elu na-ebugharị ihe agha na British Expeditionary Force na Northern France. Mgbe ndị Luftwaffe bibiri abụọ na Merville na 23 Mee, SABENA nyere iwu ka ụgbọ elu ya ndị lanarịrịnụ, gụnyere S.73 ise, ka ha kwaga France iji kwadebe maka ịnyefe Belgian Congo. Mgbe Belgium nyefere onwe ya na 28 Mee, a na-etinye ụgbọ mmiri SABENA n'aka gọọmentị France ma jiri ya na-ebugharị ndị ọkwọ ụgbọelu n'etiti ala French na French North Africa. Mgbe France chịsịrị aka elu
na 22 June 1940, ụgbọ mmiri SABENA, gụnyere S.73s, bụ ndị Italy jidere ma rụọ ọrụ site na "Regia Aeronautica". A na-eji S.73s ka nọ n'Ịtali iji kwadebe 605 na 606 "Squadriglie". Anọ S.73s lanarịrị ruo mgbe 1943 nkwekorita agha, atọ na-eji ndị Allies na otu site pro-Axis ọchịchị; niile e wepụrụ si ọrụ site na njedebe nke agha.