Vintage Uncle Sam Poster I want You for US army, by James Montgomery Flagg& more

this is an original published poster manufactured in the USA, Dover publications, incorporated, 31 East 2nd street, manola, New York 11501 I'm not exactly sure of the Year other than my friend got it from his dad in the 60s. I also have shown are a large bundle of 20 vintage US military postcards. and original US military supporting stamps. 2 photo is the poster, 3 stamps, 4, 5, 6 photo are vintage postcards of the war posters.