A soldier and two Militia members, in the background Zhenbao Island, subject of a border dispute between China and the Soviet Union that had escalated in actual fighting between Chinese and Soviet troops.
The original oil painting on which this poster was based was from 1969, and exhibited at the "Zhenbao Island Self-Defense Counterattack Exhibition" (珍宝岛自卫反击战展览). In the original version the sky was pink, at the behest of Jiang Qing it was changed to blue.