Kent /ˈkɛnt/ is a county in South East England, and one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of Medway. Kent has a nominal border with France halfway through the Channel Tunnel. Maidstone is its county town and historically Rochester and Canterbury have been accorded city status, though only the latter still holds it.
Kent's location between London and the continental Europe has led to its being in the front line of several conflicts, including the Battle of Britain during World War II. East Kent was known as Hell Fire Corner during the conflict. England has relied on the county's ports to provide warships through much of the past 800 years; the Cinque Ports in the 12th–14th centuries and Chatham Dockyard in the 16th–20th centuries were of particular importance to the country's security. France can be seen clearly in fine weather from Folkestone, and the iconic White Cliffs of Dover.
Æthelberht (also Æthelbert, Aethelberht, Aethelbert, or Ethelbert) (c. 560 – 24 February 616) was King of Kent from about 580 or 590 until his death. In his Ecclesiastical History of the English People, the eighth-century monk Bede lists Aethelberht as the third king to hold imperium over other Anglo-Saxon kingdoms. In the late ninth century Anglo-Saxon Chronicle Æthelberht is referred to as a bretwalda, or "Britain-ruler". He was the first English king to convert to Christianity.
He was the son of Eormenric, succeeding him as king, according to the Chronicle. He married Bertha, the Christian daughter of Charibert, king of the Franks, thus building an alliance with the most powerful state in contemporary Western Europe; the marriage probably took place before Æthelberht came to the throne. The influence of Bertha may have led to the decision by Pope Gregory I to send Augustine as a missionary from Rome. Augustine landed on the Isle of Thanet in east Kent in 597. Shortly thereafter, Æthelberht was converted to Christianity, churches were established, and wider-scale conversion to Christianity began in the kingdom. Æthelberht provided the new church with land in Canterbury, at what came to be known as St Augustine's Abbey.
Eadbald (Old English: Ēadbald) was King of Kent from 616 until his death in 640. He was the son of King Æthelberht and his wife Bertha, a daughter of the Merovingian king Charibert. Æthelberht made Kent the dominant force in England during his reign and became the first Anglo-Saxon king to convert to Christianity from Anglo-Saxon paganism. Eadbald's accession was a significant setback for the growth of the church, since he retained his indigenous paganism and did not convert to Christianity for at least a year, and perhaps for as much as eight years. He was ultimately converted by either Laurentius or Justus, and separated from his first wife, who had been his stepmother, at the insistence of the church. Eadbald's second wife was Emma, who may have been a Frankish princess. She bore him two sons, Eormenred and Eorcenberht, and a daughter, Eanswith.
Eadbald's influence was less than his father's, but Kent was powerful enough to be omitted from the list of kingdoms dominated by Edwin of Northumbria. Edwin's marriage to Eadbald's sister, Æthelburg, established a good relationship between Kent and Northumbria which appears to have continued into Oswald's reign. When Æthelburg fled to Kent on Edwin's death in about 633, she sent her children to Francia for safety, fearing the intrigues of both Eadbald and Oswald. The Kentish royal line made several strong diplomatic marriages over the succeeding years, including the marriage of Eanflæd, Eadbald's niece, to Oswiu, and of Eorcenberht to Seaxburh, daughter of King Anna of East Anglia.