The United Kingdom of Great Britain and Northern Ireland (usually shortened to just the United Kingdom or the UK) is a small island sovereign state in Europe. It is one of the wealthiest and most influential countries in the world, at one point being the center of the largest empire in human history, with the British Empire governing one quarter of the globe in the late 19th and early 20th centuries.
The United Kingdom was one of the major nations that mobilized during World War I. It was a dominant force in the Allied Powers which fought, and triumphed over the Central Powers. During the end of the war, Wonder Woman visited the capital, London, with several of her companions and was present at the Armistice Day celebrations at Kings Cross Station.
21 years later, the UK again mobilized with the Allied Powers, this time against the Axis Powers in World War II, and proceeded to occupy Germany after the latter nation's defeat in the 6-year conflict.