Poster showing soldiers wielding bayonets, with American flag and flame-lit sky above. United States Shipping Board Emergency Fleet Corporation. Issued by Publications Section, Emergency Fleet Corporation, Philadelphia.

Poster showing a soldier unpacking a phonograph record as another looks on. Text continues: Draft your slacker records. They will go to camp or overseas through The National Phonograph-Records Recruiting Corps.

Poster showing a florid German soldier, wearing pirate skull-and-crossbones and brandishing a bloody sword as he wades in a tide of women's and children's bodies. Printed by the U.S. Navy Publicity Bureau, N.Y. The U.S. Navy Publicity Bureau gratefully acknowledges its indebtedness to the New York Herald for the reproduction of Mr. Rogers' cartoon. Forms part of: Willard and Dorothy Straight Collection.

Poster showing a soldier with American flag and laurel wreath, surrounded by admiring citizens. At bottom: Nearest recruiting office: [blank space].

Poster showing a soldier clutching an American flag. No. 1-A. Title from item.

Poster showing a soldier carrying a rifle, and waving American, Polish, French, and British flags. Text is presented in Polish, then English. Stamped: 1003 Arcade St., St. Paul, Minn.

Poster showing a Polish soldier brandishing a rifle, and the Polish flag. Text also given in Polish, with space for listing a "recruiting centre."

Poster showing a man dressed in green, with shamrocks in his hat and at his feet, addressing a soldier. Title from item. Caption: I'll go too! P. 3177/7500.

Poster showing a soldier waving goodbye to a crowd including Uncle Sam. Monogram unidentified. Poster appears to have been trimmed from original size. Forms part of: Willard and Dorothy Straight Collection.

Poster showing a soldier and a sailor shaking hands, as a woman looks on. Paste-on at bottom: 30 East 52nd St., New York ; 375 Lexington Ave., New York ; 245 Carlton Ave., Brooklyn ; 48 Boylston St., Boston. Title from item.

Poster showing a miner with a pickaxe and a soldier with a rifle. United States Fuel Administration. No. 6.

Poster showing Liberty, modeled on the well-known statue complete with upraised torch, offering a Red Cross shield to a wounded soldier.

Poster showing Liberty, modeled on the well-known statue complete with upraised torch, offering a Red Cross shield to a wounded soldier. Title from item.

This collection uses primary sources to explore Tim O'Brien's novel, The Things They Carried. Digital Public Library of America Primary Source Sets are designed to help students develop their critical thinking skills and draw diverse material from libraries, archives, and museums across the United States. Each set includes an overview, ten to fifteen primary sources, links to related resources, and a teaching guide. These sets were created and reviewed by the teachers on the DPLA's Education Advisory Committee.

Poster soliciting contributions for the American Ambulance in Russia, 527 Fifth Avenue, New York, showing a Russian soldier with a look of dismay and gesturing towards an ambulance in the background. Poster caption continues: Send contributions to Executive Office, 527 Fifth Ave., New York City, Room 501.

Poster showing German soldiers overseeing slave labor in a factory, and whipping one of the workers. B3002 Wt 5852/2598 10M 6/18. E3114. Title from item.

Poster shows an Australian soldier blowing a trumpet with other soldiers, in a fox hole(?) with guns, are at his feet. In background, gray images of Australian men of various occupations. Title from item.

Poster showing three men in helmets, holding a surveyor's transit, a drafting compass, and a pistol. Poster appears to have been cut down from original dimensions.