After World War II, the United States and European allies entered a period known as the Cold War against the United Soviet Socialist Republics. Although it did not have significant military battles like previous wars, it was characterized by political conflict, military tension, proxy wars, as well as economic and technological competition between the Communist world and Western world. Because both sides had nuclear weapons, there was a significant deterrent to actually fighting in a major battle, which kept the war ‘cold’ (hence the name).
On both sides, however, there was the importance of keeping the population inspired and nationalistic in the struggle, and as such, there was a lot of poster printing done in a nationalistic manner on both sides.
Check out these fascinating propaganda posters from the USSR created between 1947 and 1953.