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,
Ranks in the French Army a company ("compagnie") of infantry, a squadron ("escadron") of cavalry or a battery ("batterie") of artillery. A "lieutenant" (lieutenant or first lieutenant) commands a platoon ("section") of infantry, a troop ("peloton") of cavalry, or a "brigade" of the "Gendarmerie". A "Sous-lieutenant" (sub-lieutenant or second lieutenant) commands at the same level as a "lieutenant", but is a more junior officer rank. Note the difference with many army rank systems of other countries where the term "major" is used for a rank above that of "captain". For example, the rank of "major" in the US Army or British army is equivalent to