be involved in the cleanup operation to ensure there were no traces

amount of traces left by a military object (to be hidden)

as you were

As you were, sir / ma'am!

been there, done that

who goes there?

over there

area cleanup

cleanup

cleanup detail

cleanup of radioactive areas

capacity to ensure international security

ensure attrition of threats

ensure continued national political authority

ensure coordination

ensure national security

ensure peace

ensure peace and stability in the region

ensure safety in the airspace

ensure the defense

ensure adequate provisions

ensure maximum reliability

clandestine operation; covert operation

humanitarian operation; humanitarian relief operation (HUMRO)

PZ operation (pick-up zone operation)

noncombatant evacuation operation (NEO); non-combat evacuation operation

aeromobile operation

African Union / United Nations Hybrid operation in Darfur (UNAMID)

air defense operation

air logistic support operation

air operation

airborne and amphibious operation

airborne assault operation