Which famous military leader's endorsement of a firearm in the 19th century led to its nickname becoming synonymous with the weapon itself?

Throughout military history, weapons manufacturers have sought endorsements from renowned military leaders and figures to boost their credibility and sales. From swords to firearms, these endorsements have shaped procurement decisions and public perception. This trivia question explores a famous endorsement that significantly impacted a weapon's adoption and legacy in military circles.

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General George S. Patton's endorsement of the Colt .45, leading to it being called 'Patton's Peacemaker'
Colonel Samuel Colt's self-promotion of his revolver as 'The Great Equalizer'
Lieutenant Colonel George Armstrong Custer's endorsement of the Springfield rifle as 'The Indian Tamer'
Colonel Theodore Roosevelt's endorsement of the Winchester 1895 rifle, which became known as 'The Roosevelt Gun'