人民军 is a generic noun for 'People's Army', most commonly used in compounds like
朝鲜人民军 (rénmínjūn, Korean People's Army) or
越南人民军 (Yuènán rénmínjūn, Vietnam People's Army). For China's military the standard term is
人民解放军 (rénmín jiěfàngjūn, People's Liberation Army).