The resistance war of the South Vietnamese army and people against the French colonialists has encouraged the heroic fighting spirit of the army and people throughout the country, opening the way for the victories of the resistance war later, and at the same time leaving many The lesson has profound theoretical and practical significance, including the lesson on building the all-people national defense and the people's war posture and applying it to the current cause of national construction and defense. This study focuses on analyzing the views of the US - from the policy of placing Indochina under the "international trusteeship" regime to the policy of dividing Indochina at the 16th parallel; active British support for the reconstruction of French power in Indochina; the Soviet Union's silent attitude towards France's intention to retake Indochina; France's conservative stance on Indochina issues; thereby drawing lessons on building the all-people national defense and the people's war posture.