Whip

A whip is a weapon, mostly used for punishment but also for combat.

Use
It is used by "cracking" the whip through the air, making it hit an opponent painfully. Whips also typically feature hard butt which can be used as a bludgeon.

Use by peackeepers
Peacekeepers hold public floggings, such as that of Gale Hawthorne, for some crimes, such as poaching. These both punish the offending party, and scare the local community into submission.