Sisters who led a rebellion against Chinese rule in Vietnam in the first century of the Christian era. The revolt was caused by the attempt of Chinese administrators to raise taxes and consolidate their control over the "Lac Lords," the indigenous landed aristocracy in occupied Vietnam. The two sisters, Trung Trac and Trung Nhi, were the daughters of a Lac Lord from Tay Vu, on the Red River northwest of the modern capital of Hanoi. Trung Trac, the elder, had married Thi Sach, and landed aristocrat from nearby Chu Dien. When in A.D 39 Thi Sach complained about exaction demanded by the Chinese prefect Su Ting, he was arrested and apparently put to death. In revenge, Trung Trac, supported by her younger sister, raised the flag of rebellion.

Revolt quickly swept through all of the peasants, and Su Ting fled China. Trung Trac was declared queen and set up a royal government at Me Linh, seat of the Vietnamese kingdom during the Au Lac dynasty. China, however, returned to the attack, sending the veteran military commander Ma Yuan to pacify the territory and return it to Chinese rule. In A.D 41 Trung Trac, now abandoned by most of her "Lac Lord" followers, was defeated, captured, and with her sister Trung Nhi committed suicide. Although the Trung sisters' rebellion ended in failure, the two became cult figures in the pantheon of heroic patriots struggling to restore Vietnamese independence.

Every year, on the 6th of Februarary of Lunar calendar, the Vietnamese organize a ceremony to remember the bravery of the two sisters, Trung Trac and Truc Nhi. In addition, the Trung Sisters Day was observed as the Vietnamese National Women Day.