Communist symbolism represents a variety of themes, including revolution, the proletariat, peasantry, agriculture, or international solidarity.
Communist states, parties and movements use these symbols to advance and create solidarity within their cause. These symbols often appear in yellow on a red background. The flag of the Soviet Union incorporated a yellow-outlined red star and a yellow hammer and sickle on red. The flags of Pridnestrovie, Vietnam, China, North Korea, Angola and Mozambique would all incorporate similar symbolism under communist rule.