 He is offered a promotion to Sergeant Major and a position as an advisor to the Afghan National Army.Although initially reluctant, Booth accepts and is deployed to Afghanistan during the time frame between Seasons 5 and 6 when he, Bones, Angela, and Hodgins leave Washington, D.C. for a year-long sabbatical.Despite his distinguished service record, Booth is generally reticent about his military service and rarely speaks about it openly, even with Bones.