This mind map outlines the key nodes of World War II. On August 23, 1939, the Nazis signed a treaty with the Soviet Union, and on September 1, Germany invaded Poland, leading to the outbreak of war. The Auschwitz concentration camp opened in May 1940, Germany invaded the west on May 10, and Dunkirk withdrew on May 26. These events profoundly influenced the process of World War II, and through a clear timeline, important events in the early stages of World War II are presented, helping people understand the historical development of World War II.

This mind map presents important nodes of World War I. The assassination of the Grand Duke became the trigger of the war, and then the war began. The Ottoman Empire joined the war and expanded its scale. The Battle of the Marne River was a crucial battle that influenced the course of the war. The spread of the declaration boosted morale, while the start of the gas war brought new war terror. These events connect important stages of World War I and clearly demonstrate the historical development process of World War I.

This mind map outlines the key milestones of the Vietnam War. The fall of Dien Bien Phu changed the situation, and the establishment of the Republic of Vietnam marked the establishment of a new regime. After the collapse of the Geneva Accords, the situation deteriorated, and accusations in the Gulf of Tonkin triggered US intervention. US troops landed in South Vietnam, and the war escalated. These events profoundly influenced the course of the Vietnam War, presenting important stages of the war through a clear timeline and helping people understand the history of the Vietnam War.