The history of Great Britain spans thousands of years, beginning with early settlements by Celtic tribes. The Romans invaded in 43 AD, establishing Roman Britain until their withdrawal in the 5th century. Following this, the island experienced invasions by Anglo-Saxons, Vikings, and the Normans, leading to the establishment of feudalism and the Magna Carta in 1215. In the following centuries, Great Britain saw the rise of powerful monarchies, the Tudor dynasty, and the English Civil War. The union of England and Scotland in 1707 formed the Kingdom of Great Britain, which later included Wales and Ireland, shaping its modern political landscape.