Nearly ten years later, the Boxer Rebellion took place in China in 1900, and the German minister was killed in the Beijing riots. The powers organized the allied forces, and the Kaiser proposed that Wadesi be the commander-in-chief of the allied forces, which was accepted by all countries, so Wadesi was awarded the rank of marshal by the Kaiser. As for the reasons why countries accept Germans as commander-in-chief, Wadesi recorded in his diary: Austria and Italy sent very few military forces as commander-in-chief, and neither Britain nor Russia would agree to let the other be commander-in-chief. Moreover, at that time, Britain made a fool of itself in the Boer War, which made countries unable to believe the British military level. It is unthinkable for an American or a Japanese to be commander in chief. The interests of the United States in China are not as great as those of European powers, and it was not very active from the beginning. After all, the Japanese are still looked down upon in the eyes of old European empires. Strangely, France is not opposed to the appointment of Wadesi, and the French themselves have never taken the initiative to seek this position.

In this way, in August of 1900, wadesi was appointed as the commander-in-chief of Eight-Nation Alliance. But for this militarist, the irony is that he still can't fight. Beijing was occupied before he set out from Europe. Only northeast China has sporadic fighting with Russian troops, and only a small garrison of foreign powers in China has occupied Beijing. Waders set off from Europe by cruise ship and arrived in Tianjin after a two-month voyage. At the same time, the powers also sent more troops to consolidate the situation in the occupied areas of China. There is no mention of Sai Jinhua's activities in China in Vader's diary. More interesting is that there are two parts, one is the narrative of signing a peace treaty as commander-in-chief of the allied forces, and the other is the narrative of Eight-Nation Alliance's robbery in China.