Which famous military product's design was deliberately painted with a distinctive 'shark mouth' as a visual branding technique that significantly boosted morale and became widely recognized in WWII?

Throughout military history, the development and promotion of advanced weaponry has involved sophisticated product design and marketing strategies. From ancient swords to modern aircraft, military equipment manufacturers have employed various branding techniques to secure government contracts and establish reputation. This poll tests your knowledge of how famous military equipment designs became iconic products that shaped warfare.

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P-40 Warhawk fighter aircraft
M4 Sherman tank
B-17 Flying Fortress bomber
PT-109 torpedo boat