Here are the answers to your questions: 13. World War I Treaties Two treaties signed under the Versailles Treaty by the Allies and the Central Powers after World War I were: Treaty of Saint-Germain (with Austria) Treaty of Trianon (with Hungary) 14. Immediate Cause of WWI The immediate cause of the First World War was the assassination of Archduke Franz Ferdinand of Austria-Hungary. 15. Axis Power in WWII One Axis power in World War II (1939-1945) was Germany. 16. USA Joining WWII The United States of America joined the Allied powers in the 2nd World War due to the attack on Pearl Harbor by Japan. 17. Post-WWI International Organization The international organization formed after the 1st World War was the League of Nations. 18. Triple Alliance Members Two members of the Triple Alliance during the 1st World War were: Germany Austria-Hungary 19. World War II a) Mention 5 causes of World War Two (1939-1945) 1. Treaty of Versailles: The harsh terms imposed on Germany after WWI created resentment and economic instability. 2. Failure of the League of Nations: The League's inability to effectively address aggression by nations like Japan, Italy, and Germany undermined its credibility. 3. Rise of Fascism and Nazism: The aggressive expansionist ideologies of totalitarian regimes in Germany (Nazism) and Italy (Fascism) fueled territorial ambitions. 4. Policy of Appeasement: Britain and France's policy of appeasing Hitler's demands, such as the annexation of the Sudetenland, emboldened him to pursue further expansion. 5. German Expansionism: Germany's aggressive territorial expansion, culminating in the invasion of Poland, directly triggered the war. b) Discuss the results of the Second World War (1939-1945) The Second World War had profound and lasting results: Massive Loss of Life and Destruction: The war caused an unprecedented number of casualties, estimated at 70-85 million people, and widespread destruction of cities, infrastructure, and economies across Europe and Asia. Emergence of Superpowers and the Cold War: The United States and the Soviet Union emerged as the dominant global superpowers, leading to an ideological and geopolitical rivalry known as the Cold War. Formation of the United Nations: The League of Nations was replaced by the United Nations, an international organization designed to promote peace, security, and cooperation among nations. Decolonization: The war weakened European colonial powers, accelerating the process of decolonization and the independence of many nations in Africa and Asia. Technological Advancements: The war spurred rapid advancements in technology, including nuclear weapons, jet engines, radar, and early computers, which had significant post-war implications. Changes in Global Power Dynamics: The war shifted the global balance of power away from traditional European empires towards the two new superpowers, fundamentally reshaping international relations. Last free one today — make it count tomorrow, or type /upgrade for unlimited.