After Immelmann's death, Boelcke was withdrawn from combat on 27 June 1916, while he was the war's leading ace, and assigned to "Fliegertruppe" (Flying Troops) headquarters. His reassignment was in line with the German military doctrine of "auftragstaktik", or order tactics: The belief that the junior officer on the battlefield best knows the tactics needed there. As part of his staff duties revamping the "Fliegertruppe" into the "Luftstreitkräfte" (Air Force) in early October 1916, Boelcke wrote the "Dicta", which was then distributed throughout the "Luftstreitkräfte" as the world's first tactical manual. It was two years before the British and French followed suit in 1918. Spurred by the example of the "Dicta", many of the world's military air forces would eventually develop their own tactical manuals, codified as tactics, techniques, and procedures.