Territorial changes refer to the alterations in the boundaries or control of land between countries or regions. These changes can occur due to various reasons, including wars, treaties, colonization, or negotiations. For example, the end of World War I led to significant territorial changes in Europe, reshaping nations like Germany and Austria-Hungary. Such changes can impact the political, social, and economic landscape of the affected areas. New borders may create ethnic tensions or alter trade routes. Historical events, like the Treaty of Versailles, often formalize these changes, establishing new nations or adjusting existing ones to reflect the outcomes of conflicts.