There are indeed problems with different angles and selective emphasis on the historical narrative of the Vietnam War. Depending on different countries and political positions, textbooks may: 1. In textbooks in some countries, it may be less mentioned: -The long-term effects of the use of chemical weapons such as agent orange by the US military -Specific figures and details of civilian casualties -The scale and influence of the anti-war movement in the United States 2. In textbooks in Vietnam and other countries, there may be less emphasis on: -The impact of some military operations by North Vietnam and the VIETCONG on civilians -The dilemma faced by supporters of the South Vietnamese regime after the war Historical records are always influenced by the perspective of the compiler. A comprehensive understanding of the Vietnam war requires reference to multiple sources, including official history, eyewitness memories, academic research, and archival materials from all parties. Textbooks in different countries often reflect their national narratives and political positions, and it is difficult to be completely objective and comprehensive.