The United Kingdom of the British Isles (commonly known as the United Kingdom, the UK, sometimes Britain) is a sovereign state located off the northwestern coast of continental Europe. It is an island country, spanning an archipelago including Great Britain, the island of Ireland, and many small islands.
The United Kingdom is a constitutional monarchy and unitary state consisting of four countries: England, Ireland, Scotland and Wales. It is governed by a parliamentary democracy with its seat of government in London, the capital, but with three devolved national administrations of varying powers in Dublin, Cardiff and Edinburgh, the capitals of Ireland, Wales and Scotland respectively.
Following the Silver Sky and the English victory at Agincourt, French morale collapses and the nobility abandon the Dauphin hoping to keep a measure of their own power when the English take the remainder of France. Instead, King Henry V, seeing the French collapse, decides to consolidate his power in the occupied territories and plan for a future campaign to crush any further resistance in the south of France. Also, the destruction of Coventry and reports of deformed survivors required addressing.
Upon Edward VI's death, his daughter Elizabeth inherited the crown of England, and by marriage, this then passed to William Douglas, making him William III of England. In 1488 William's father James III of Scotland dies, and the crowns of England and Scotland are united under William. William's position outside and within the Order of the Veil made him now the most influential man in the British Isles, and he used this influence to persuade the Irish parliament to elevate him from Lord of Ireland, to King of Ireland. William now held three thrones, and only King Llewellyn I of Wales kept him from realizing his dream of uniting all the islands of Britain.
With the three crowns united under William, he began seeing some of the difficulties this would bring. He had so far kept his faith as a McGregorist secret, for fear of alienating his mostly Catholic English subjects, but doing so also alienated his majority McGregorist subjects in Scotland and Ireland. Seeing it as an opportunity both as a way of placating the McGregorists of Ireland and Scotland, but as also a way of spreading the McGregorist faith within England, he decreed an act of tolerance towards McGregorists. While this was mostly seen within England as placating the Scots and Irish, it allowed McGregorist missionaries within England, and the faith quickly gained ground.
With William now firmly in control of Ireland, Scotland, and England, King Llewellyn I of Wales saw that if William wished to simply conquer Wales and add it to his realms he could easily do so. Instead Llewellyn entered into negotiations with William and the Order of the Veil. Llewellyn wanted leadership of the Order of the Veil, and titles for the house of Rhys in Wales in exchange for naming William as his heir and abdicating the throne. William saw this as an easy trade and accepted. In 1494, Llewellyn I abdicated the throne, with William inheriting, uniting the crowns of Ireland, Scotland, Wales, and England under one king.
With the four kingdoms under his rule, William III began pushing for further integration of the kingdoms, and with the help of the Order of the Veil, only a year later an act of union is passed in each parliament, establishing the United British Kingdoms.