Air Chief Marshal Hugh Caswall Tremenheere Dowding, 1st Baron Dowding, GCB, GCVO, CMG (24 April 1882 – 15 February 1970) was an officer in the Royal Air Force. He was Air Officer Commanding RAF Fighter Command during the Battle of Britain and is generally credited with playing a crucial role in Britain's defence, and hence, the defeat of Adolf Hitler's plan to invade Britain.