This poster was produced to celebrate the fifteenth year anniversary of Mao visiting the Chinese Submarine. On the left hand side of the poster it was Mao’s writing, and it states the following, “In order to defend against the Imperialism, we must establish strong Navy, Mao Ze Dong, February 21, 1953”. Below the picture, it says “Created in memory of great leader chairman Mao visiting Navy Submarine division 15th year anniversary”. This poster, as indicated by the lower right hand side writing, was created by the Political department of Chinese Navy. Size: 30” L by 20.5”.