The UN peacekeeping force exists only when the states in the forum agree to form one. It's not like "the UN" is sending troops, but a few states - not every UN

The UN peacekeeping force exists only when the states in the forum agree to form one. It's not like "the UN" is sending troops, but a few states - not every UN member mind you - put some troops together, give them blue insignia and send them do the things they agreed in the forum to do.