Informal empire

The term informal empire describes the spheres of influence which a polity may develop that translate into a degree of influence over a region or country, which is not a formal colony, protectorate, tributary or vassal state of empire, as a result of its commercial, strategic or military interests.

In a 2010 article, Gregory Barton and Brett Bennett defined informal empire as:

A willing and successful attempt by commercial and political elites to control a foreign region, resource, or people. The means of control included the enforcement of extraterritorial privileges and the threat of economic and political sanctions, often coupled with the attempt to keep other would-be imperial powers at bay. For the term "informal empire" to be applicable, we argue, historians have to show that one nation's elite or government exerted extraterritorial legal control, de facto economic domination, and was able to strongly influence policies in a foreign country critical to the more powerful country's interests.

An informal empire may assume a primarily economic guise, or it may be enforced by gunboat diplomacy. Strategic considerations or other concerns may bring about the creation of an imperial influence over a region not formally a component of empire.