Romania picked the wrong side in two world wars. In WWI they thought the Russians were doing well in 1916 and so joined with them. Romania was quickly overrun by German / Austrian troops and occupied for the duration of the war. In WWII, the Romanians thought they knew better. They sided with Germany from the start (what was the alternative? siding with Stalinist Russia was not really an option.) Germany assisted Romania in the war by proving military supplies and various trade. Romania provided most of Germany's natural petroleum supplies. Romania's military fought well alongside Germany's, on the Russian front. About 500,000 Romanian troops died here including large numbers in the Stalingrad campaign of 1942-43. The western allies bombed what parts of the country they could, but the long distances involved prevented the mass terror bombing perpetrated on Germany. After the war, Romania suffered like the rest of eastern Europe at the hands of the Soviets. The country was brutalized by Soviet occupation. Some territory was stripped away. A puppet pro-Soviet government was set up. Secret police terrorized the populace. Eventually the Soviets withdrew and Communism collapsed. The pro-Soviet leadership was disbanded or executed. The Romanians did extremely well out of WW1. They gained Transylvania, the Banat and several adjoining districts, the Bukovina and Bessarabia. The country doubled in size! They were in very good standing with the West because they suppressed the Bela Kun's Communist uprising in Hungary in 1919.