Treaty of Versailles:The Treaty of Versailles was the most important peace treaty that brought World War I to an end, imposing heavy reparations and territorial losses on Germany while shaping the post-war order in Europe.
Mandate System: The Mandate System was established by the League of Nations, allowing certain nations to govern former territories of the Ottoman Empire as mandates, which were seen as a temporary form of administration until these territories could achieve independence.
Nationalism:Nationalism is a political ideology that emphasizes the interests and culture of a particular nation or group, often leading to movements for independence and self-determination among various ethnic groups, especially in regions affected by colonialism.