Under what circumstances can the united nations use force to stop a conflict within a member country

The use of force could be use only on the last resort.

Explanation:

The United Nations can only use force on the last resort. It could also be used in self defence but before the United Nations peace keeping troop could use force, they have to seek the approval from the United Nations Security Council which comprises of the following nations as members United States, Britain, France, Russia and China.

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