Diplomatic history is the study of how countries interact with each other through negotiations, treaties, and alliances. It examines the methods and practices used by diplomats to manage international relations and resolve conflicts. Key events, such as the signing of the Treaty of Versailles or the establishment of the United Nations, are often focal points in this field. This discipline also explores the roles of influential figures, like Henry Kissinger or Kofi Annan, in shaping global diplomacy. By analyzing these interactions, historians can better understand the evolution of international politics and the impact of diplomacy on world events.