After the overthrow of the Qing dynasty, Yuen Chai Wan continued his military career. He participated in the struggle against the intervention of Europe and Japan, as the military and working in exploration under the command of Chiang Kai-shek, he has seen a lot. Chiang Kai-shek was leader of the right-wing group aims to break with the Communists and the suppression of the revolutionary movement.
Matapos ang pagbagsak ng kapangyarihan ng Dinastiyang Qing, ipinagpatuloy ang kanyang militar karera Yuen Chai Wan. Lumahok siya sa pakikibaka laban sa pakikialam ng Europa at Japan, pati na ang militar at nagtatrabaho sa paggalugad sa ilalim ng utos ng Chiang Kai-shek, nakita niya si ng maraming. Chiang Kai-shek ay lider ng right-wing group na naglalayong sirain ang Communists at ang pagsugpo ng rebolusyonaryo kilusan.