The document summarizes the First Northern Expedition led by Chiang Kai-shek from 1926-1928 to conquer China and defeat the warlords. It was initially successful with political agents gaining support and key areas captured with little resistance. However, the campaign had limited long term success as many warlords kept private armies and power. The document also describes the Shanghai Massacre of 1927 where Chiang purged communists from the cities, with hundreds arrested, tortured, and shot in an attempt to minimize CCP power and influence.