In July 1926, the Kuomingtang launched their Northern Expedition to reunify China and defeat the warlords. They rapidly defeated the armies of Beiyang-affiliated warlords Wu Peifu and Sun Chuanfang, sparking Zhang Zuolin to establish the National Pacification Army (NPA; also known as the "Anguojun"/"Ankuochun") anti-Kuomintang warlord coalition in November 1926. Following a series of internal struggles within the KMT, Chiang Kai-shek purged the Communists from his National Revolutionary Army in April 1927, and the expedition was halted. During this period, the a conference of the warlord leaders of the NPA was held in June 1927. They resolved that all civil and military power would be concentrated in the person of Zhang Zuolin. Zhang was declared "Generalissimo", and consequently formed a new military government. This was the only time in the history of the Beiyang regime that it was explicitly a military government. Pan Fu was made Prime Minister and Minister of Communications, Liu Changqing was made Minister of Agriculture and Labor, Yan Zebo was made Minister of Finance, Wang Yingtai was made Minister of Foreign Affairs, Liu Zhe was made Minister of Education, He Fenglin was made Minister of Military Affairs (including the navy), Shen Ruilin was made Minister of the Interior, Zhang Jinghui was made Minister of Industry, Yao Zhen was made Minister of Justice, and Xia Renhu was made Chief Cabinet Secretary. Zhang published a manifesto for the new government, declaring that he would free China from Bolshevism (the "Reds") and chaos, and that he would reverse the unequal treaties through negotiation. Soon after, Zhang's Foreign Office sent a request to the Japanese Legation in China to request the withdrawal of Japanese troops from Shandong. The civil service began to improve and start functioning again. The navy and army ministries were merged to create the Ministry of Military Affairs.