The United Kingdom of Great Britain and Northern Ireland (commonly known as the United Kingdom or Britain), is a group of countries that consists of England, Scotland, Wales and Northern Ireland along with their capital cities, respectively, London, Edinburgh, Cardiff and Belfast. Britain is an island nation located 35 miles off the coast of France.
During the early twentieth century, Britain and along with their allies France and Russia were the instigators of the Great War by declaring war on Germany, in which British and French forces invaded the German West African protectorate of Togoland in 1914. Britain was one of the Allied victors of the war and later became a member nation of the newly created European Trade Organization.
By the 1940s or earlier, the British government became aware of the Chimera's existence in isolationist Russia. Military preparations were made in which the British built a massive defense network to defend the British Isles from potential invasion. The British government through King Edward VIII had made attempts to convince an isolationist United States to support the United European Defence against the Chimera. Inevitably in December 1949, the Chimera invaded and conquered Europe within less than two months, and leaving Britain the last European nation left standing against the Chimera. The British Royal Navy heavily defended the English Channel as the British government evacuated civilians and European refugees. During the early outbreak of the war, the British government evacuated 300,000 people, consisted mostly of women and children along with members of Parliament and their families, to Avalon One in Australia. By May 1951, three million people were further evacuated from Britain to Canada and Greenland.
Throughout mid-1950, Britain was near-constantly besieged by Chimeran aircraft. Inevitably, on October 1950, after the Royal Navy was attacked and scuttled in March, the Chimera unexpectedly attacked London by using Burrowers to dig under the English Channel despite early warning signs from the Burrowers' seismic activity. British Central Command in London was destroyed by flood through the River Thames. Between October and November, fleets of Chimeran dropships invaded London and mass bombardment of Spire missiles infected many British citizens. Thereafter the Chimera began unearthing Chimeran towers throughout Britain, which the British mistakenly believed they were constructed.
Following the Chimeran occupation, the remains of the British military waged a bloody guerrilla war against the invaders. Sometime prior to July 1951, the British captured a Chimeran Angel and offered it to the United States in exchange for military support and supplies. However, despite America's intervention, the initial American support in Britain turned to disaster during Operation Deliverance; in which the Chimera were led into attacking the American task force by the Cloven and leading into a complete massacre. The British were without American military support for the time being except for a lone survivor of Operation Deliverance, Nathan Hale.
It was from the efforts of Hale that the British made several successful engagements against the Chimera and ultimately allowed a turning point for humanity when Hale discovered the Chimera's weakness by destroying the main Chimeran hub tower in London, culminating in the Battle of London on July 14th. It is during this desperate battle between Anglo-American and Chimeran forces that Hale and allied forces infiltrated the London Tower and destroyed its central nuclear fission reactor, resulting in a explosive chain reaction that demolished the main tower and the entire tower network in Britain, and eradicating the Angels. With the Angels dead, the remaining Chimera forces, who depended on the Angels, quickly die off and Britain was freed from the Chimera.
In August 1951, Britain returned to full military engagement and allied with the Maquis to liberate Western Europe in Operation Overstrike. Despite Britain's liberation, the Chimera launched a re-invasion of the UK from Spain (which was not liberated during Operation Overstrike) in order to stem the British military-fueled liberation of Europe. As Britain could not divert the invasion with its own forces who were in Europe, Colonel Rachael Parker requested reinforcements from US Special forces. The American reinforcements were successful in foiling the Chimera; however the Chimera continued to attack Britain from Spain until by 1957, in which the Chimera gained a foothold in the Welsh coastline, forcing British forces to call on both military and civilian assistance for support to stop the Chimera from moving further inland.