noun
battalion
buh-TAL-yun/bəˈtæliən/
A large organized group, especially a military unit made up of several companies.
The battalion assembles in several distinct company blocks.

Etymology
A 'battle squadron' was a body of troops organized for fighting. The name became a more specific organizational term for part of a regiment, comprising several companies.
In context
The battalion was made up with reserve men, and the weather continued fine.
More examples
- Several companies formed the battalion.
- A battalion of volunteers arrived to help.
- The commander addressed the battalion.
Forms
battalion · battalions
Similar words
- unit
- An organized group of any size.
- contingent
- A group forming part of a larger force.