The Great War Series A collection of all War Times Journal resources relating to the First World War. Includes historic archives, photo galleries and specially written articles. wtj.com/wars/greatwar/
World War I: Telegram from Acting Secretary of State Frank L. Polk The online iteration of the National Archives and Records Administration's Rotunda Exhibition. This exhibit features original documents that tell the history of the United States of America nara.gov/exhall/originals/zimm1.html
Encyclopedia Smithsonian - Cher Ami Cher Ami was a registered Black Check Cock carrier pigeon, one of 600 birds owned and flown by the U.S. Army Signal Corps in France during World War si.edu/resource/faq/nmah/cherami.htm
Submarine Design Evolution a brief description of the history of submarine designs, from human powered machines to today's nuclear submarines.