A battalion is a military UNIT typically composed of 300 to 800 soldiers. It is the smallest UNIT in an ARMY that is commanded by a lieutenant colonel. A FORCE is a large group of people or things with a common purpose, while a REGIMENT is a military UNIT consisting of several battalions. A CORPS is a large and highly organized military UNIT, usually consisting of two or more divisions. A BRIGADE is a large military UNIT composed of two or more regiments or battalions. A CONTINGENT is a group of people or things of indefinite number, while a LEGION is a large military UNIT, usually consisting of several thousand soldiers. A MULTITUDE is an immense number of people or things, while a HORDE is a large group of people or animals. A SQUAD is a small military UNIT typically composed of four to twelve soldiers, while a HOST is a large number of people or things. A UNIT is a single thing or person regarded as a whole, while an ARMY is a large organized body of people trained for war. The Seabees are a UNIT of the United States Navy Construction Battalions.