Paris 1919 by 
World War I by 
World War I by Posters: World War I Posters - The Library of Congress Prints & Photographs Division has extensive holdings of World War I era posters. Available online are approximately 1,900 posters created between 1914 and 1920. Most relate directly to the war, but some German posters date from the post-war period and illustrate events such as the rise of Bolshevism and Communism, the 1919 General Assembly election and various plebiscites.
The Posters That Sold the War to the American Public - Smithsonian Magazine looks at the posters that helped push the American public toward the war.
African Americans and World War I - New York Public Library exhibit that looks at the transformative experience that was World War I in African American history.
Fighting For Respect: African American Soldiers in WWI - Created by the Army History Foundation, this is a look at the experience of African American soldiers during World War I.
African-American Veterans Hope Their Service in World War I Would Secure Their Rights at Home. It Didn't - Time Magazine opinion piece.
WWI's Untold Story: The Forgotten African Battlefields - A CNN look at the East Africa Campaign.
Misremembered History: the First World War in East Africa - British Council report on the East Africa Campaign.
How the Trauma and Struggles of World War I Helped Shape the Modern World - A look at the psychological after effects of World War I.
Pre-State Israel: Palestine During World War I - Jewish Virtual Library looks at Pre-State Israel from 1914 - 1922
The Middle East During World War One - BBC looks at the history of the Middle East during World War One.
A New View of the Battle of Gallipoli, One of the Bloodiest Conflicts of World War I - Smithsonian Magazine look at the Battle of Gallipoli.
What Happened at Gallipoli? - The Guardian asks the question: In a military disaster 100 years ago, about 58,000 allied soldiers died. What was the plan, exactly what went wrong, and what is Gallipoli's legacy?
Imperial War Museums - Primary source materials related to the British experience in WWI.
National Archives (UK) - Primary Source materials related to WWI.
Digital Public Library of America - Primary Source materials.
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