peloton

noun2

1. •
   A group of riders formed during a cycling road race; especially, the main group of riders; the pack.
2. •
   (historical) Synonym of platoon (“a small group of soldiers”) or section (cognate with the former; not invariably synonymous with it, depending on century of use).

   • A regiment of cavalry consists of six squadrons, each squadron of four pelotons, each peloton of two companies, each company of two escouardes, and each escouarde of two men. — 1840