Final answer:
Propaganda has been used throughout history to manipulate and influence public opinion. Each time period had its own understanding and approach. World War I and World War II propaganda posters were used to encourage enlistment and promote the war effort.
Step-by-step explanation:
Propaganda has been used throughout history to manipulate and influence public opinion. Each time period of propaganda had its own understanding and approach. In World War I, propaganda posters were used to encourage men to enlist by highlighting the benefits of joining the navy. In World War II, posters were used to promote the war effort and generate support. Propaganda has evolved over the ages, and its techniques have become more sophisticated with the advancement of technology.