peacekeeping mission(n = noun.act) peacekeeping, peacekeeping operation - the activity of keeping the peace by military forces (especially when international military forces enforce a truce between hostile groups or nations);
is a kind of military operation, operation

combat mission, diplomatic mission, foreign mission, military mission, mission, mission bells, mission impossible, peacekeeping, peacekeeping operation, reconnaissance mission, search and destroy mission, search and rescue mission, search mission, suicide mission