In international politics, the term gunboat diplomacy refers to the pursuit of foreign policy objectives with the aid of conspicuous displays of naval power, implying or constituting a direct threat of warfare should terms not be agreeable to the superior force. Etymology The term "gunboat diplomacy" comes from the nineteenth-century period of imperialism, when Western powersfrom Europe and the United Stateswould intimidate other, less powerful entities into granting concessions through a demonstration of Western superior military capabilities, usually represented by their naval assets. A coastal country negotiating with a Western power would notice that a warship or fleet of ships had appeared off its coast. The mere sight of such power almost always had a considerable effect, and it was rarely necessary for such boats to use other measures, such as demonstrations of firepower. A notable example of gunboat diplomacy, the Don Pacifico affair in 1850, saw the British Foreign Secretary Lord Palmerston dispatch a squadron of the Royal Navy to blockade the Greek port of Piraeus in retaliation for the assault of a British subject, David Pacifico, in Athens, and the subsequent failure of the government of King Otto to compensate the Gibraltar-born (and therefore British) Pacifico. The effectiveness of such simple demonstrations of a nation's projection of force capabilities meant that nations with naval power and command of the sea could establish military bases (for example, Diego Garcia, 1940s onwards) and arrange economically advantageous relationships around the world. Aside from military conquest, gunboat diplomacy was the dominant way to establish new trade relationships, colonial outposts, and expansion of empire. Peoples lacking the resources or technological innovations available to Western empires found that their own peaceable relationships were readily dismantled in the face of such pressures, and some therefore came to depend on the imperialist nations for access to raw materials or overseas markets. Theory Diplomat and naval thinker James Cable spelled out the nature of gunboat diplomacy in a series of works published between 1971 and 1993. In these, he defined the phenomenon as "the use or threat of limited naval force, otherwise than as an act of war, in order to secure advantage or to avert loss, either in the furtherance of an international dispute or else against foreign nationals within the territory or the jurisdiction of their own state." He further broke down the concept into four key areas: Definitive Force: the use of gunboat diplomacy