National Protection War was a major event that saved the republican system many times since the establishment of the Republic of China through the Revolution of 1911 led by Dr.Sun Yat-sen.The center and front of this great war were in Zhu De's hometown of Sichuan,and its main battlefield of Luna was the place where Zhu De made his outstanding achievements for the National Protection War.In this great war,although Zhu De still a middle-ranking officer,but he was always able to accurately grasp the battlefield situation and the opportunity to defeat the strong enemy at the critical moment and key place,making a miraculous achievement for the victory of National Protection War,and the elegance of a proletarian strategist and militarist was initially displayed.At the same time,Zhu De also showed an extraordinary subjective perception of the war,forming a clear understanding that the victory of the National Protection War and even Sun Yat-sen's Three Principles of the People and the Revolution of 1911 could not really save the people in China.The lofty intention made Zhu De quickly transform into a Marxist and grow into a great proletarian revolutionist and militarist in the tide of the New Democratic Revolution.