The National Revolutionary Army set out from Guangzhou on the Northern Expedition and reached Beijing two years later.
Tips
usage
In ancient history 北伐 is any southern regime's campaign to win back the north: 祖逖 and 刘裕 under the Eastern Jin, 岳飞 under the Southern Song, and 诸葛亮 marching on Wei from Shu. The opposite direction is 南征 'to campaign south'.
history
The Northern Expedition of 1926–1928 was launched from Guangzhou by the Nationalists, at first in alliance with the Communists, under 蒋介石. It ended the rule of the 北洋军阀 Beiyang warlords and united most of China under the Nanjing government.