For nearly two centuries, gunboat diplomacy was the blunt instrument of empire. A warship appearing off a weaker nation’s coast was not merely a show of force — it was a verdict. Resistance was futile. Geography and technology combined to make submission the only rational option. From Lord Palmerston’s gunboats battering concessions out of Qing China during the Opium Wars to Commodore Matthew Perry’s black ships forcing Japan open in 1853, naval power projection became the mechanism through which the strong dictated terms to the weak.