defect to the USSR Allies Romania
As was the case with the Allies, membership in the Axis was fluid, with some nations switching sides or changing their degree of military involvement over the course of the war; Romania, a prime example of both, became the second Axis power in Europe after the September 1943 armistice with Italy, only for the government to defect to the USSR with the Soviet counteroffensive into central Europe in August 1944.