Upon entering WWI on August 4, 1914, the United Kingdom put together various recruitment posters.  -- Link

Previously:
USSR Propaganda and Advertisement Posters from 1917 to 1991, Vintage Chinese Propaganda Posters, Woot! Winners Gallery: Windows vs. OS X Propaganda Posters

The Polish came out with some very cool poster designs.  Check out a the gallery.  I'm guessing the posters are for movies and theater.

[Pictured: And The Ship Sails On, 1986]

Previously:
Polish Movie Posters

Check out the vintage original 60s and 70s posters over at L-dopa.  If your interests lie in travel, advertising, sports or just plain cool things, you will want to check out these galleries.

Previously:
Vintage Cigarette Ads, Vintage Drug Ads,  Vintage Children's Books, Vintage Chinese Propaganda Posters, Vintage Folgers Coffee Commercials, USSR Propaganda and Advertisement Posters from 1917 to 1991

Here is a gallery of vintage cigarette ads from Europe.

[via MonkeyFilter]

Previous vintage galleries on BC:
Vintage Drug Ads, Vintage Chinese Propaganda Posters, Vintage Children's Books, USSR Propaganda and Advertisement Posters from 1917 to 1991

I know safety isn't a laughing matter, but I found some of these NATA safety posters  quite amusing.

Here is a gallery of some Polish movie posters.

(The poster on the left is for the classic sci-fi movie 2001: A Space Odyssey.)

Previously:
Woot! Winners Gallery: Windows vs. OS X Propaganda Posters, USSR Propaganda and Advertisement Posters from 1917 to 1991, Vintage Chinese Propaganda Posters, Lazy Weekend Links (Old-time and kinky comics)

Here is a gallery of over 1400 USSR propaganda and advertisement posters from 1917 to 1991.

Previously:
Woot! Winners Gallery: Windows vs. OS X Propaganda Posters, Vintage Chinese Propaganda Posters

"Face the enemy courageously." 
Printed in January 1979

Browse through hundreds of vintage Chinese propaganda posters that range from culture, the military, sports, movies and socialism.  Very interesting.