Why did the British impose a blockade?

The British imposed a blockade during various historical conflicts, most notably during the Napoleonic Wars and World War I, to weaken enemy nations by restricting their trade and access to vital resources. The blockade aimed to cripple the economies of adversaries, limit their military supplies, and enhance Britain's naval supremacy. By controlling sea routes and preventing goods from reaching enemy ports, Britain sought to force a surrender or negotiate favorable terms. Additionally, blockades were seen as a means to protect British interests and maintain dominance in global trade.