a number of international agreements that describe how people should be treated when trapped in war Many countries are able to provide a wide range of mutual legal assistance to other countries through their ministries of justice, even if there is no treaty, through joint investigations between the police forces of the two nations, of emergency conditions , rogatory commissions, etc. However, in some developing countries, national legislation can effectively create barriers to effective law enforcement cooperation and mutual legal assistance.  In addition to treaties, there are other, less formal international agreements. These include efforts such as the Proliferation Security Initiative (PSI) and the G7 Global Partnership Against the Proliferation of Weapons of Mass Destruction. Although the PSI has a “declaration of prohibition principles” and the G7 Global Partnership includes several statements by G7 heads of state and government, it also does not have a legally binding document that sets specific obligations and is signed or ratified by member states. The United Nations Convention on Combating Desertification: an international convention to help countries whose lack of rain has the effect of aridating land to the point where it cannot be used for agriculture. 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. the Treaty on the European Union: an agreement reached in 1991 in the Dutch city of Maastricht, in which the Member States of the European Union agreed on plans for their future, including economic union and the introduction of the single currency. It came into force in 1993. Modern states have developed mechanisms for requesting and obtaining evidence of criminal investigations and prosecutions. Where evidence or other forms of mutual legal assistance, such as testimony or the distribution of documents, are required by a foreign sovereign, States may attempt to cooperate informally through their respective police services or to resort to what are commonly referred to as “mutual assistance requests”.
 The practice of mutual legal assistance has developed from the comity-based system of letters rogatory, although it is now much more common for states to directly address requests for mutual legal assistance to the designated central authority in each state. In current practice, such requests can continue to be made on the basis of reciprocity, but also under bilateral and multilateral agreements that require countries to provide assistance. an agreement between two or more individuals, groups or countries in which they agree to cooperate to achieve something The IHR (2005) is an international agreement between 194 States Parties and the World Health Organization to monitor, report and respond to any events that could pose a threat to international public health. The objective of the IHR (2005) is to prevent, protect, control and respond to a public health response to the spread of diseases internationally, in a manner adapted to public health risks, limited to them, avoiding unnecessary intervention in international transport and trade.