Formally the occasion when a country formally adheres to a group of countries or an agreement accepts an agreement between two or more countries or persons that give them power or influence the idea that national governments play a more important role in international relations than more permanent organizations such as public services a bilateral agreement or activity is one that involves two groups or countries under international law. , a treaty is a legally binding agreement between states (countries). A treaty can be called a convention, protocol, pact, agreement, etc. It is the content of the agreement, not its name, that makes it a treaty. Thus, the Geneva Protocol and the Biological Weapons Convention are the two treaties, although neither treaty in its name. Under U.S. law, a treaty is a legally binding agreement between countries that requires ratification and “consultation and approval” of the Senate. All other agreements (internationally treated) are called executive agreements, but are nevertheless legally binding on the United States under international law. Alliance, in international relations, a formal agreement between two or more states on mutual assistance in the event of war. Contemporary alliances provide for joint action by two or more independent states and are generally defensive and force allies to regroup when one or more of them are attacked by another state or coalition.
Although alliances may be informal, they are generally formalized by an alliance treaty whose most critical clauses are those that define casus foederis or the circumstances under which the treaty obliges one ally to help another. A treaty is negotiated by a group of countries, either through an organization created for this purpose or by an existing body, such as the United Nations Council on Disarmament (UN). The negotiation process can take several years depending on the purpose of the contract and the number of participating countries. At the end of the negotiations, the treaty is signed by representatives of the governments concerned. Conditions may require that the treaty be ratified and signed before it becomes legally binding. A government ratifies a treaty by setting up a ratification instrument in a place defined by contract; the ratification instrument is a document containing formal confirmation of the Adoption of the Treaty provisions by the Government. The ratification process varies according to national laws and constitutions.