The southward expansion of the Han dynasty comprises a series of military campaigns and expeditions in what is now modern South China and Northern Vietnam. Military expansion to the south began under the previous Qin dynasty and continued during the Han. Campaigns were dispatched against the Yue tribes, leading to the annexation of Minyue by the Han in 135 BCE and 111 BCE, Nanyue in 111 BCE, and Dian in 109 BCE.