The US Library of Congress has announced a release of a large collection of WWI newspaper clippings. These are available for free on their website.
Quote from Library of Congress:
World War I: A Wartime Clipping Service Update: All 400 Volumes Now Online
The massive collection, World War History: Newspaper Clippings, 1914 to 1926, is now fully digitized and freely available on the Library of Congress website. The 79,621 pages are packed with war-related front pages, illustrated feature articles, editorial cartoons, and more. You can search by keywords, browse the content chronologically, and download pages.
Coverage begins on June 29, 1914 with articles focusing on the assassination of Archduke Franz Ferdinand of Austria and continues into the post-war world through Dec. 31, 1926. The clippings provide a tremendous resource for the examination of the devastating Great War and its aftermath. The chronological arrangement of daily press coverage from multiple sources is invaluable.