General Tony McAuliffe (1898 to 1975)
Anthony C. McAuliffe was a US Army general who commanded the force defending Bastogne, Belgium, in the Battle of the Bulge (December 1944) during World War II.
At the time of the Normandy invasion (June 1944), he was artillery commander of the 101st Airborne Division. He was in command of the entire division when the Germans counterattacked in the Ardennes; his stout defence of Bastogne checked the German drive and contributed directly to the final defeat of the Germans.
You can read about the circumstances of the reply @ https://www.army.mil/article/92856/the_story_of_the_nuts_reply.