The Allies realized that a fatal blow could be dealt to the Germans if Ploesti could not produce. It was worth a dangerous mission by the United States Army Air Forces (USAAF) in August 1943. USAAF’s 8th and 9th Air Forces contributed B-24 groups that trained in the desert for operations against models of Ploesti. They were routed around Bucharest, which had heavy anti-aircraft defenses. Almost everything went wrong, with the lead plane and its precious navigator crashing before reaching Romania, to unexpectedly heavy fighters and flak over the target. Still, some damage was done to Ploesti, but continuous raids were needed. 54 planes were lost with 53 heavily damaged out of 177, making further follow-up raids impossible until April 1944. By the end of the war, shuttle raids had caused serious damage to Ploesti’s refineries and made oil production tenuous.
In February 1943, Red Army offensives north and south of Stalingrad cut through Romanian forces, causing many casualties. The cold and lack of transportation caused further fatalities. The German soldiers held the Romanians in contempt, not understanding that they were poorly armed, poorly fed, and led by incompetent, corrupt officers.
As the Red Army approached Bucharest, King Michael deposed Antonescu and joined the Allies. Russian troops entered Romania in August 1944. The Red Army immediately began recruiting men to fight against Germany.
Romania became a Soviet satellite after World War II, and was a signatory of the Warsaw Pact in 1955.