 Complete the following phrase:  When hearing about the German proposal regarding Yakov, Stalin rejects it, saying he will not trade a Field Marshal for a soldier. The Yugoslav partisans break out of an encirclement. The Soviet counter-offensive is launched in Kursk. Erich von Manstein commits all his forces to a final assault, bringing the Soviets close to defeat. Vatutin urges to send in the strategic reserve, which 