Which famous military product, first widely deployed in World War I, was advertised as 'the gun to end all wars' due to its unprecedented firing rate and battlefield impact?

Throughout military history, certain products and innovations have dramatically altered the course of warfare. From the longbow to nuclear weapons, technological breakthroughs have defined military capability and strategy. This trivia question focuses on one of the most influential military products that transformed infantry combat during the early 20th century and continues to impact military and civilian sectors today. Test your knowledge of this famous military product that revolutionized modern warfare and became one of the most recognized weapons in history.

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The Maxim Gun, the first recoil-operated machine gun
The Gatling Gun, Richard Gatling's hand-cranked rapid-fire weapon
The Thompson Submachine Gun, nicknamed the 'Tommy Gun'
The Browning Automatic Rifle (BAR), John Browning's light machine gun