Battalion -

: The word originates from the Late Latin battalia , meaning "battle" or "combat". It evolved from describing any large group of soldiers ready for battle into a formally organized fighting unit. Texas A&M University Publication

: Several companies form a battalion, while several battalions typically form a brigade or regiment. battalion

: A typical battalion includes operational companies (e.g., infantry, armor, or artillery), a weapons company, and a headquarters unit. : The word originates from the Late Latin