Introduction
“The purposes of the United Nations are: (1) To maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace; (2) To develop friendly relations among nations based on respect for the principle of equal rights and self-determination of peoples, and to take other appropriate measures to strengthen universal peace; [... Article 2. The UN] shall act in accordance with the following Principles. […] (4) All Members shall refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state”.
An explanation of the Russian invasion
The Russian experience of NATO enlargement
The very fact that we are ready not to deploy NATO troops beyond the territory of the Federal Republic gives the Soviet Union firm security guarantees.
The decision for the U.S. and its allies to expand NATO into the east was decisively made in 1993. I called this a big mistake from the very beginning. It was definitely a violation of the spirit of the statements and assurances made to us in 1990.
“Following the completion of the withdrawal of the Soviet armed forces from [East Germany. … Foreign] armed forces and nuclear weapons or their carriers will not be stationed in that part of Germany or deployed there”.
On the one hand, [the 1969 Vienna Convention on the Law of Treaties] defines treaties as “international agreements” […]. On the other hand, it employs the term “international agreements” for instruments, which do not meet its definition of “treaty”. Its Art. 3 refers also to “international agreements not in written form”. Although such oral agreements may be rare, they can have the same binding force as treaties, depending on the intention of the parties. An example of an oral agreement might be a promise made by the Minister of Foreign Affairs of one State to his counterpart of another State.
[The Vienna] Convention definition of a treaty does not include oral agreements (Article 2) although according to the convention, its definition shall not affect the legal force of such agreements (Article 3(a)). […] whether a statement is made orally or in writing makes no essential difference. […] Under customary international law, oral agreements are just as binding as written ones (Prepared for the Committee of Foreign Relations).
Nuclear weapons are so destructive and ballistic missiles are so swift, that any substantially increased possibility of their use or any sudden change of their deployment may well be regarded as a definite threat to peace.
Weapons of mass destruction in violation of International Law: Iraq and Ukraine
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