"Let's catch him with his "panzers" down?" US World War II propaganda poster.

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"Remember Your First Thrill of American Liberty" US WWI propaganda poster.

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"If you can't enlist - invest."  US World War I propaganda poster.

Link.

Italian World War II propaganda poster (circa 1943) showing a U.S. African-American soldier desecrating a church.

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"but."  Contemporary British propaganda poster against benefit claimants by the Department for Work and Pensions.

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UK World War I propaganda poster.

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US Anti-Communist propaganda comic book cover. "Is This Tomorrow"' published in 1947 by the Catechetical Guild.

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Chinese propaganda poster. "We'll destroy old world and build new." Classical example of the Red art from the early Cultural Revolution. Worker crushes the crucifix, Buddha and classical chinese texts with his hammer; 1966.

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Soviet propaganda poster (1942) by Viktor Koretsky. "The soldier, save me from slavery!"

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Soviet propaganda poster (1941). "join the ranks of the front brigades, a fighter needs your hands and aid!"

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"Let the historic rage of our ancestors inspire you in this war." Soviet World War II propaganda poster.

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A 1941 Soviet propaganda poster by Kukryniksy artists: "We will ruthlessly defeat and destroy the enemy!"

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A 1941 World War II Soviet poster by Kukryniksy Artists. The inscription in the lower left hand corner translated into English is "Let the historic rage of our ancestors inspire you in this war."

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"The Red Army fighter, save us!" (Viktor Koretsky, 1942). Soviet World War II propaganda poster.

Link.

Anti-Nazi propaganda poster.

Australian anti-conscription propaganda poster from World War One.

Alright, it's not propaganda, but it's dang cute.

Swedish Anti-Euro poster by the Green Party’s youth organization for the EMU referendum of 2003.

Link.

War On Terror Propaganda Posters

London.

Metro D.C.

As noted in the Link, these posters do strongly resemble communist posters.

Chinese propaganda poster promoting communist prospects of scientific advancement with a caption reading: ‘Science can be dangerous and difficult; bitter struggles can set new standards'."

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1919 poster, "Mount your horses, workers and peasants! The Red Cavalry is the pledge of victory."

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Bolshevik propaganda poster of Trotsky slaying the dragon of counter-revolution, 1918.

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Russian Civil War White Army propaganda poster depicting Trotsky as a devil.

Link.