Field officer rank category (OF-3 to OF-5) of the Russian Imperial Army and Navy until 1917. The British Army (in which these officers are called officers of field rank), and some others in the Commonwealth (including the Australian Army and New Zealand Army), also include the brigadier in this category: the equivalent in other armies is a general officer (the brigadier general). Today, a field officer in the United States (here called field grade) Army, Marine Corps, and Air Force is typically a major, lieutenant colonel, or a colonel: Field officer A field officer, field-grade officer, or senior officer is an army,
Australian Army officer rank insignia below from highest to lowest: The rank of second lieutenant has been phased out of the Australian Army, with officer recruits now graduating from the Royal Military College, Duntroon with the rank of lieutenant. SCDT and OCDT are equivalent rank titles. The rank of Officer Cadet is given to those who are studying at the Australian Defence Force Academy. Their rank is then changed to Staff Cadet upon entry to the Royal Military College, Duntroon (RMC-D) where they become a part of the Corps of Staff Cadets. Officer cadets wear a 10mm wide white stripe, on a DPCU slide or