Brigham Young University
Wwi Doc. Archive: German Discussions Concerning Unrestricted Submarine Warfare
Read this official German document, translated into English, from 1917 concerning the issue of unrestricted submarine warfare in World War I.
Other
Germany's High Sea Fleet in the World War
Entire online text of an original book written by the chief German Admiral in World War One.
World War 1
Worldwar1.com: Trenches on the Web: Armory: U Boats: Assassins of the Seas
This site contains pictures, charts and general information on Germany's use of submarine warfare. It focuses on the second phase of submarine usage, i.e., to disrupt trade lines and enforce embargos.
World War 1
Worldwar1.com: Great War Society: Relevance: America's Turn From Neutrality to Intervention
Essay discussing the events that influenced the U.S. to change its foreign policies during the years of 1914 to 1917. (Published Spring 1992, revised May 24, 1996)
Curated OER
History Matters: The Zimmerman Telegram Bringing America Closer to War
This is a copy of the actual Zimmerman Telegram where Germany states that it "Intends to begin - unrestricted submarine warfare." A great primary source that takes students deeper into historical understanding.
Digital History
Digital History: The United States Wwi
This site explains how Germany resuming unrestricted submarine warfare contributed to the US entering WWI. Site is well-written, informative, and contains great details.
Other
Uboat.net: Imperial German Majesty's Uboats in Wwi
A Brief article describing the U-boat crisis of 1916 and the declaration of unrestricted submarine warfare
Other
New Hampshire State Library: World War Ii Posters
This site contains various posters the US Government used during World War II to raise nationalism and increase the armed forces.
Siteseen
Siteseen: American Historama: Sussex Pledge
Comprehensive overview provides detailed facts and information on the Sussex Pledge, a promise to the US to alter the German policy of unrestricted submarine warfare in WWI.
Curated OER
Image
A site detailing the events leading up to the US' involvement in WWI, especially the sinking of the Laconia. Includes a primary source document, a newspaper article written at the time of the sinking.