While Lovell was attending pre-flight training in the summer of 1948, the navy was beginning to make cutbacks in the program, and cadets were under a great deal of pressure to transfer out. There were concerns that some or most of the students who graduated as Naval Aviators would not have pilot billets to fill. This threat persisted until the outbreak of the Korean War in 1950. Lovell applied and was accepted to the United States Naval Academy in the fall of 1948. During his first year he wrote a treatise on the liquid-fueled rocket engine. He attended Annapolis for the full four years, graduating as an ensign in the spring of 1952 with a B. S. degree. He then went to flight training at NAS Pensacola from October 1952 to February 1954.