Which product innovation, first widely deployed during World War I, fundamentally changed infantry tactics and is credited with breaking the stalemate of trench warfare?

Throughout military history, certain products and innovations have dramatically altered battlefield tactics and strategy. From ancient times to modern warfare, technological breakthroughs have often determined the outcome of conflicts. This trivia question explores one of the most significant product innovations that transformed military history and shaped the course of numerous battles. Test your knowledge of how product development has influenced warfare throughout the ages!

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The tank, developed by the British as 'landships' to cross No Man's Land while providing mobile protection
Poison gas weapons, primarily chlorine and mustard gas, deployed to clear enemy trenches
The Thompson submachine gun, offering unprecedented firepower for close-quarters trench combat
Steel helmets (like the British Brodie helmet), designed specifically to protect against artillery shell fragments