<P> The kingdom of England emerged from the gradual unification of the early medieval Anglo - Saxon kingdoms known as the Heptarchy : East Anglia , Mercia , Northumbria , Kent , Essex , Sussex , and Wessex . The Viking invasions of the 9th century upset the balance of power between the English kingdoms , and native Anglo - Saxon life in general . The English lands were unified in the 10th century in a reconquest completed by King Æthelstan in 927 CE . </P>
<P> The kingdom of England emerged from the gradual unification of the early medieval Anglo - Saxon kingdoms known as the Heptarchy : East Anglia , Mercia , Northumbria , Kent , Essex , Sussex , and Wessex . The Viking invasions of the 9th century upset the balance of power between the English kingdoms , and native Anglo - Saxon life in general . The English lands were unified in the 10th century in a reconquest completed by King Æthelstan in 927 CE . </P>
who was the first leader of unified england
who was the first leader of unified england
King Æthelstan
King Æthelstan