The first female officer to command a major Unified Combatant Command in the United States Armed Forces succeeded a Navy admiral who served as the 23rd commander of what?
William E. Gortney: William Evans "Bill" Gortney (born September 25, 1955) is a retired United States Navy admiral who most recently served as the sixth commander of U.S. Northern Command and the 23rd commander of North American Aerospace Defense Command (NORAD). William E. Gortney:  He assumed his post as CDRUSNORTHCOM and commander of NORAD on December 5, 2014, and was succeeded by USAF General Lori Robinson on May 13, 2016.
i don't know