Regarding the Vietnam War, history textbooks in different countries and regions may present different narratives based on their respective educational policies, political positions, and cultural backgrounds. Some textbooks may intentionally or unintentionally omit certain facts, including but not limited to the following aspects: 1. **Political bias and stance**: History textbooks in many countries reflect the political stance of their governments and societies. For example, American textbooks may emphasize the role and decision-making process of the United States in the Vietnam War, and may mention less about the profound impact of the war on the Vietnamese people. Conversely, Vietnamese textbooks may emphasize the struggle for unification between North Vietnam and South Vietnam, and mention less about external interference in the war. 2. **Selective reporting of sensitive events**: Some sensitive events related to the war, such as the My Lai Massacre or the landmine problem in Vietnam, may be downplayed or ignored in textbooks in some countries. This selective reporting may be due to the consideration of avoiding controversy or maintaining a certain national image. 3. **Ideological influence**: During the Cold War, there were obvious differences in educational content between the two major camps of the East and the West. Textbooks in Western countries may emphasize the threat of communism and the importance of anti-communism, while textbooks in socialist countries may emphasize anti-colonial and anti-imperialist themes. This ideological difference leads to different interpretations and narrative emphases of the same historical events. 4. **Access to materials and authentication**: Due to the existence of information control and propaganda warfare during the war, textbooks in different countries may be written based on limited or selected materials, which may lead to certain facts being ignored or misunderstood. 5. **Educational goals and curriculum settings**: The educational systems of different countries have different teaching goals and curriculum settings, resulting in different levels of emphasis on historical events. This may also affect the depth and breadth of chapters, so that certain facts are simplified or omitted in textbooks. In general, when presenting the Vietnam War, history textbooks may emphasize or ignore certain facts for various reasons mentioned above. In order to obtain a comprehensive and objective understanding of history, readers are advised to refer to materials from multiple sources, including historical documents, academic research, and first-hand materials from different countries and different perspectives.