Brigade (noun)

1. A large group of people, especially soldiers, working together.
2. A unit of police officers, especially one that deals with a particular type of crime.

Origin:

Late 17th century: from french brigade, from italian brigata, from briga "quarrel, fight", based on brigare "to dispute".

Examples:

1. The infantry brigade advanced on the enemy positions.
2. She was the head of the environmental protection brigade.
3. The fire brigade arrived within minutes to tackle the blaze.
4. A brigade of workers was sent to repair the damaged road.
5. The parade was led by a brigade of marching bands.