1. Alliance System and Rivalries - International alliances and tensions leading up to World War I (1905-1914). 2. European Tensions - Political and military developments increasing hostility in Europe before 1914. 3. Schlieffen Plan and Western Front - German military strategy, its failure, and resulting trench warfare. 4. Naval Warfare and Gallipoli - Key battles at sea and the strategic Gallipoli campaign. 5. Germany’s Defeat - Factors leading to Germany’s surrender and the end of World War I.