Original: Warlord factions which had been persuaded to ally with Chiang during the Northern Expedition had to be constantly pacified, as well as regional military governors who ruled regions that were not directly administrated by Chiang's central government.
Simplified: Warlord factions which had been persuaded to ally with Chiang during the Northern Expedition (1926–1927) had to be constantly pacified, as well as regional military governors who ruled regions that were not directly administrated by Chiang's central government.