Propaganda posters are visual artworks designed to influence public opinion and promote specific ideas or agendas. They often use bold images, catchy slogans, and striking colors to grab attention and convey messages quickly. Common themes include war efforts, political movements, and social causes, aiming to inspire action or support from the audience. These posters have been used throughout history, especially during times of conflict, such as World War I and World War II. Governments and organizations create them to rally citizens, encourage enlistment, or promote national unity. Their powerful imagery and concise messages make them effective tools for communication.