British poster, 1939: The Progress of Russian and German Co-operation. (The poster is by Egyptian cartoonist Kem, and is intended for use in the Middle East.)
One of the many 'Careless Talk Costs Lives' propaganda posters by Fougasse 1940 for the Ministry of Information. Fougasse was art editor of the Punch magazine when WW2 broke out in 1939 and offered his services free to the British Government, producing propaganda material for almost every ministry. Source: V Search Collections
North Vietnamese Propaganda poster "Victory of Vietnam is a Victory of Solidarity"
Vietnam-era protest poster