These were requested in response to the Soviet T-34 and KV-1 tanks, with far heavier armour and armament than the mobile armoured vehicles fielded by the Wehrmacht at the time. Many German companies submitted projects, including Maschinenfabrik Augsburg-Nürnberg (MAN), Daimler-Benz (DB), Henschel, and Porsche. The winning entry tanks would go on to become the famous Tiger I and Panther tanks, and capable opponents to the T-34 if ultimately too late and at too small of a scale to affect the course of the war.