where did the rank gunnery sergeant come from
Gunnery sergeant The rank of gunnery sergeant in the Marine Corps was established by the Navy personnel act of March 3, 1899 (30 Stat. L., 1009) reflecting the duties of Marines in ship's detachments. The original insignia was three chevrons point up with three straight "ties" with an insignia of a bursting bomb over a crossed rifle and naval gun. From 1904 to 1929 the insignia went to three stripes only over a bursting bomb on top of crossed rifles. In 1929, like the rank of first sergeant, two "rockers" were added beneath the stripes with the same insignia in the middle. In 1937 the middle insignia was dropped. The rank was replaced by technical sergeant in 1946 until restored in 1959, when the crossed rifles insignia were added to Marine chevrons.[6]
Staff sergeant Staff sergeant (SSgt) is E-5 in the U.S. Air Force. It ranks above senior airman and below technical sergeant. It is the Air Force's first non-commissioned officer rank, as well as the first Air Force rank to which promotion is attained on a competitive basis. Sergeants, also known in Air Force jargon as "buck sergeant"', no longer exist, having been eliminated in the 1990s after sharing the same pay grade with that of the rank of senior airman (E-4). Staff sergeants are expected to be technically proficient and function as first-line supervisors within a 'work center'. After being selected for promotion, senior airmen must attend Airman Leadership School, which teaches them basic leadership skills and how to write performance reports to become staff sergeant. The term of address is "Staff Sergeant" or "Sergeant". High year of tenure was reduced from 20 to 15 years in 2013.