A more thorough explanation:

International criminal law is a type of law that deals with crimes that happen across national borders. It also covers serious crimes that happen within a country, such as genocide, crimes against humanity, and war crimes. This law is used to regulate the behavior of individuals, organizations, and countries that commit these types of crimes.

International criminal law is enforced by international criminal tribunals, such as the International Criminal Court. Some examples of international crimes include piracy and terrorism. These crimes are considered serious because they can affect people from different countries and can cause harm on a large scale.

For example, piracy is a crime that happens on the high seas and can involve people from different countries. Terrorism is a crime that can happen anywhere in the world and can affect people from different countries. These examples illustrate how international criminal law is used to regulate behavior that can have an impact beyond national borders.