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,
Colonel some military police forces such as Military Police (Brazil), the Carabineros de Chile and the French National Gendarmerie. The Police of Russia, being a paramilitary organization, also uses this rank. Colonel Colonel ( "kernel", abbreviated Col., Col or COL) is a senior military officer rank below the brigadier and general officer ranks. However, in some small military forces, such as those of Monaco or the Vatican, colonel is the highest rank. It is also used in some police forces and paramilitary organizations. Historically, in the seventeenth, eighteenth and nineteenth centuries, a colonel was typically in charge of a regiment in