Panther tank
In early March 1943, Hitler planned a massive offensive against the Kursk salient known as Operation Citadel in the hope of regaining the initiative in the east. On 15 April 1943, Hitler signed Order Number 6 to begin the offence. Within 24 hours of the attack Alexander Foote had informed Soviet intelligence. Roessler's intelligence wasn't only strategic in nature. He supplied the Soviets with detailed information on the new German Panther tank.