1927 (Unspecified Date):
Sichuan Clique breaks up.
January:
United Provinces invades Zhejiang. However, they are unable to conquer it entirely. NRA troops break through in Fujian and extend their control over Zhejiang. Guizhou ends its alliance with the Nationalists.
February:
United Provinces troops withdraw from Zhejiang.
March:
Nationalist troops under Jiang Jieshi and the Xiang provincial army under Tang Shengzhi invade Anhui and Jiangsu. With Communist support Jiang captures Shanghai; he then attacks Nanjing and captures it as well. Jiang moves his base of operations to Nanjing, solidifying his position as an alternative centre of power to the official GMD government in Wuhan. Jiang's relocation northwards allows the Gui Clique to assume power in Guangdong.
April:
The discord between Jiang Jieshi and Wuhan erupts into a conflict, with the GMD's left wing (including the Communist Party) aligning with Wuhan and the right wing with Nanjing. In response Jiang purges Communists in Shanghai. The warlord factions aligned with the GMD mostly align with Jiang Jieshi, except for Tang Shengzhi's Xiang Clique, probably rescuing the Wuhan Government from destruction as otherwise it has no military. In the chaos Sun Chuanfang launches a counterattack against the GMD and retakes much of Anhui.
May:
Though split from each other, both GMD factions commit to continuing the Northern Expedition. Wuhan advances into Henan, while Jiang Jieshi leads a counteroffensive towards Xuzhou. The Guominjun also invades Henan and captures Luoyang. With most of his remaining domains fallen to the NRA, Wu Peifu resigns. His remaining army joins forces with Northeast Army troops entering the province to arrest further NRA advances.
June:
The Guominjun takes Zhengzhou and Jiang takes Xuzhou. The Guominjun, ostensibly neutral in the Wuhan-Nanjing conflict until this point, negotiates with both factions but ultimately aligns with Nanjing. The Guominjun refrains, however from military action in accordance with this.
July:
Though heavily shaken by its recent defeats, the United Provinces army (though now with all of its provinces defected to or seized by the Nationalists) still remains in the field. With assistance from the Northeast Army and support by Japan, Sun Chuanfang begins a counteroffensive. He succeeds in driving the NRA back and advances on Nanjing. The Chinese Communist Party, previously an ally of the Wuhan Government, are expelled by it, ending the First United Front.
August:
Communist forces attempt to seize Nanjing from the Xiang Clique, but they are unable to hold the city and retreat to the Hunan-Jiangxi border. On August 12 Jiang Jieshi agrees to resign his position as commander-in-chief of the Nanjing GMD, ending the conflict between the two sides. Sun Chuanfang's counteroffensive reaches Nanjing, but he is unable to take the city. Most of his troops are trapping g south of the Yangtze and surrender, marking the beginning of the end for Sun Chuanfang. At the same time, the Guominjun invades Shandong.
September:
The Guominjun is unable to continue its advance in Shandong and retreats back to Henan. The Wuhan government agrees to dissolve itself and merge with the Nanjing government, with the Xiang Clique moving its base of power to Wuhan. A new GMD government is formed under the leadership of the New Gui Clique. At this juncture, Yan Xishan's Jin Clique declares its allegiance to the Nationalist cause. Tang Shengzhi refuses to recognise the new government, however, and his Xiang Clique becomes a major threat to the newly reunited GMD.
October:
The Jin Army engages with the Northeast Army in Hebei. Though its military success is limited, the Northeast Army is unable to defeat it and forced to divert troops northward to counter the new threat. GMD troops attack the Xiang Clique, which begins to collapse under the pressure.
November:
The Xiang Clique is defeated by the Nationalists and its territory falls under the New Gui Clique's authority. With their troops freed up from the southern campaign, the Nationalists launch a new offensive against Sun Chuanfang. Communist uprising in Guangzhou.
December:
Communists in Guangzhou are defeated and retreat into the mountains. The Nationalists capture Xuzhou, forcing Sun Chuanfang to retreat into Shandong.