Among those principles in the U.N. Charter to defend are:
1) Respect for the principle of equal rights and self-determination of peoples, and to take other appropriate measures to strengthen universal peace (Article 1.2)
2) Respect for the principle of the sovereign equality of all its Members. (Article 2.1)
3) Settle international disputes by peaceful means in such a manner that international peace and security, and justice, are not endangered. (Article 2.3)
4) Refrain in international relations from the threat or use of force against a State. (Article 2.4)
5) Respect the territorial integrity or political independence of any States (Article 2.4)
6) Non-intervention in matters which are essentially within the domestic jurisdiction of any state (Article 2.7)