World War 1
Worldwar1.com: Great War Society: Doughboy Center: The Sinking of the Tuscania
This site provides a detailed account of the sinking of the Tuscania by a German U-Boat. Includes images and firsthand accounts of the attack.
The History Cat
The History Cat: Lincoln's High Tech War
Describes the weaponry used during the Civil War, and some of the innovative technology that the Union's military forces employed. These included the minie ball, rifles, underwater torpedoes, the use of hot air balloons, and improved...
Other
Lusitania Online: Homepage
Lusitania Online is the "Definitive site for information on the RMS Lusitania and her last Master, Captain W.T. Turner."
Other
Black Inventor Online Museum: Andre Reboucas
Read about the Brazilian inventor who designed a device that became the world's first torpedo.