Du Yuming
The NRA was founded by the KMT in 1925 as the military force destined to unite China in the Northern Expedition. Organized with the help of the Comintern and guided under the doctrine of the Three Principles of the People, the distinction among party, state and army was often blurred. A large number of the Army's officers passed through the Whampoa Military Academy, and the first commandant, Chiang Kai-shek, became commander-in-chief of the Army in 1925 before launching the successful Northern Expedition. Other prominent commanders included Du Yuming and Chen Cheng. The end of the Northern Expedition in 1928 is often taken as the date when China's Warlord era ended, though smaller-scale warlord activity continued for years afterwards.