· First traffic signal system in Ohio on the 5th August 1914. · First tank in combat, the British Mark 1 Tank, on 15th September 1916. · First diesel-electric locomotive, built by General Electric in 1917.
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• Planes • Submarines • Nuclear weapons • Colossus • Tanks • Poison gas • Flamethrower • Zeppelins • Gas masks •
1914-1918World War I began in 1914,
July 28, 1914 to November 11, 1918 (July 28, 1914, assasination of archduke Ferdinand) (November 11 1918, treaty of Versailles)
July 28, 1914 through November 11, 1918
The war started in 1914 with the assassination of the archduke of austria-hungary, franz ferdinand