peacekeeper

n.	1.	a member of a military force that is assigned (often with international sanction) to preserve peace in a trouble area.
	2.	someone who keeps peace; as, she's the peacekeeper in that family.
	3.	the pistol of a law officer in the old West.

Noun	1.	peacekeeper - a member of a military force that is assigned (often with international sanction) to preserve peace in a trouble area
	2.	peacekeeper - someone who keeps peace; "she's the peacekeeper in that family"
	3.	peacekeeper - the pistol of a law officer in the old West

armed forces, armed services, military, military machine, soldier, war machine