The document summarizes the political divisions in 9th century England. It describes how England was divided into several major and minor Anglo-Saxon kingdoms that were constantly warring with each other and fighting off Viking invaders. By King Alfred's time in the late 9th century, England had consolidated into the Anglo-Saxon Heptarchy - seven major kingdoms of Kent, Sussex, Wessex, Essex, East Anglia, Mercia, and Northumbria. Wessex was the most powerful, eventually conquering the other kingdoms and unifying England under one ruler in the 10th century.