During my time in the RASC/RCT 1960-6 the 3 chevron rank was to be written as 'Serjeant' or 'Sgt'. As a mere Corporal Clerk I obeyed this instruction without question even though it made no sense to me because the Sgt was Sergeant! I do believe this varied between Corps. Alan T... >Going by the dictionary then it seems it should be spelt with a "G" in the military and "J" in the legal profession. Just as the meaning of words change over the years, the spelling can change too. King's Regulations for the Army for 1912 spells it Serjeant (44 times on just one page!), as does the edition for 1935. Queen's Regulations for 1955 also spells it Serjeant, but Queen's Regulations for 1975, which is the edition currently in use, uses Sergeant.