1940年秋冬，东北抗日联军第三路军第十二支队开进三单地区，在地方党组织和人民群众的紧密配合下，展开了广泛的抗日游击活动，袭击敌据点十余处，与日伪军作战四五十次，沉重地打击了日本侵略者，动摇了日伪反动统治。日伪当局把这一抗日游击活动称之为“三肇事件”，视其为 In the fall and winter of 1940, the 12th Detachment of the 3rd Route Army of the Northeast Anti-Japanese Forces Forces entered into the Shanban region. Under the close cooperation of local party organizations and the masses, the Anti-Japanese Guerrilla Campaign was launched extensively, attacking more than 10 enemy positions and The Japanese and puppet troops fought four to ten times and severely attacked the Japanese invaders and shaken the Japanese-puppet reactionary ruling regime. The Japanese-puppet authorities called this anti-Japanese guerrilla activity “the third victim incident” as its own