(The name of) any of various military-political movements dedicated to the establishment of an independent state for a people under colonial or other alien rule. Abbreviated NLF.
National Liberation Front/ˌnaʃ(ə)n(ə)l lɪbəˈreɪʃn ˌfrʌnt/ /ˌnaʃən(ə)l lɪbəˈreɪʃn ˌfrʌnt/
1940s; earliest use found in The Oakland Tribune. From national + liberation + front.