Erwin Rommel

 was a Nazi field marshall during the North Africa campaign in the Sahara Desert in 1941. He was known for his gifting the enemy medical supplies and his "soft" treatment of his prisoners. In 1941, Rommel heard the Tuareg had made new friends with extraterrestrial lifeforms. After telling the Twelfth Doctor about these "friends from the sky", the Doctor insisted that they go on a mission to see the Tuareg. The tribesmen began firing at Rommel's men with Sontaran blasters, but the Doctor disarmed one of them with his sonic screwdriver and asked the Tuareg to escort him and Rommel to the camp. The chieftain Bhaki introduced the Doctor and Rommel to the tribe's allies, the Sontarans. (COMIC: The Instruments of War)

Behind the scenes
Part One of The Instruments of War does not give a first name to Rommel. However, given the references to the real world history of Field Marshall Rommel and the World War II setting of The Instruments of War, author Mike Collins's intention seems to to be that this is intended to be the Rommel.