The army rank of captain is a commissioned officer rank historically corresponding to the command of a company of soldiers. The rank is also used by some air forces and marine forces, but usually refers to a more senior officer. Today, a captain is typically either the commander or second-in-command of a company or artillery battery. In the Chinese People's Liberation Army, a captain may also command a company, or be the second-in-command of a battalion.
Captain Törni in the Finnish Army in 1944.
A company is a military unit, typically consisting of 100–250 soldiers and usually commanded by a major or a captain. Most companies are formed of three to seven platoons, although the exact number may vary by country, unit type, and structure.
1980s Soviet Motorised Company (BTR)
Company B, 3rd Battalion, of the 75th Ranger Regiment in Somalia, 1993.
Stryker BCT Rifle Company, 2010.
Company B of the 113th Infantry, part of the American Expeditionary Force, France, 1919