The hammer and sickle is a communist symbol representing proletarian solidarity between agricultural and industrial workers. It was first adopted during the Russian Revolution at the end of World War I, the hammer representing workers and the sickle representing the peasants.

Communist symbolism represents a variety of themes, including revolution, the proletariat, the peasantry, agriculture, or international solidarity. The red flag, the hammer and sickle and the red star or variations thereof are some of the symbols adopted by communist movements, governments, and parties worldwide.