an underground Marxist–Leninist, black-nationalist militant organization that operated in the United States from 1970 to 1981.

The Black Army (pronounced , Latin: Legio Nigra), also called the Black Legion/Regiment – were the military forces serving under the reign of King Matthias Corvinus of Hungary.

The (chữ Nôm: ) a splinter remnant of a bandit and mercenary group recruited largely from soldiers of ethnic Zhuang background and former Taiping soldiers who crossed the border in 1865 from Guangxi, China into northern Vietnam, during the Nguyễn dynasty, and were hired and sponsored by Vietnamese authorities to fight against other bandits and rebels.