Final answer:
Themes displayed frequently on war posters during World War II included patriotism, demonizing the enemy, and promoting unity and strength.
Step-by-step explanation:
Themes displayed frequently on war posters during the second World War included patriotism, demonizing the enemy, and promoting unity and strength. These themes can be seen in posters from various countries, such as the United States and the Soviet Union. For example, American posters emphasized the determination of infantrymen and the protection of freedom and democracy, while Soviet posters portrayed scenes of German defeat and depicted Stalin as a rallying symbol for the regime. These posters were created to generate support for the war effort and mobilize the population.