The document summarizes the history of Britain from prehistory to the 20th century in 9 sections. It describes how Britain was invaded and settled by Romans, Germanic tribes like Anglo-Saxons and Vikings, and was then conquered by Normans in 1066. This brought Britain into the mainstream of European culture. English became the dominant language over time, while Welsh language and culture remained strong. The 17th century saw the English Civil War and Glorious Revolution. In 1707, Scotland and England merged with the Act of Union. The British Empire expanded greatly during the 18th-19th centuries, but declined in the 20th century after World War 1.