Their opponents in the first round were Petrolul Ploiești of Romania , whom they beat Competition 2–0 in a play-off match after the two-leg tie resulted in Causation a 3–3 scoreline .

Operation Tidal Wave was an air attack Attack by bombers of the United States Army Air Forces ( USAAF ) based in Libya and Southern Italy on nine oil refineries around Ploiești , Romania on 1 August 1943 , during World War II .