Senior Pentagon military planner fired US Secretary of War Pete Hegseth fired Lt. Gen. Brett Sylvia this week from his position as the US Joint Chiefs of Staff. According to Giva, citing two U.S. officials familiar with the matter who asked not to be named, Sylvia headed the Joint Chiefs of Staff's Directorate of Strategy, Plans and Policy, known as "J5. "The reason for the dismissal of this military official has not yet been determined. According to Giva, it is not yet clear who will replace Sylvia.