護法運動
Following Sun Yat-sen's request for help from the Comintern, Borodin was ordered to lead a contingent of Soviet advisors to Guangzhou, where Sun had established a revolutionary government in the aftermath of the Constitutional Protection Movement. Borodin understood no Chinese; English was to be the medium of discussion between the two. He was known for speaking with a clear midwestern American accent that offered no indication of his Russian origin, allowing him to easily communicate with the largely anglophone and American-educated leadership of the Kuomintang (KMT). Greeted upon his arrival in Guangzhou by Eugene Chen, with whom he later became close, Borodin found that Sun's government was teetering on the brink of collapse. Faced with rampant corruption, anti-Bolshevik feeling in parts of the KMT, and the ever-present threat of the warlords and the Beijing-based Beiyang government, Borodin was tasked with reforming the Kuomintang into a potent revolutionary force.