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| 0707 | Succession |  |
| Essex Succeeds as King of the East Saxons |
| 0757 | Capture of Mercia | |
| Mercia Wins control of the Kingdom of Mercia, seeks to establish Mercian hegemony in England |
| 0757 | Succession | |
| Mercia Elected King of Mercia, a patrician of the Royal Line of Mercia descended from Wibba |
| 0772 | Capture of Sussex | |
| Sussex Offa captures Sussex & it ceases to exist as a kingdom |
| 0774 | Capture of London | |
| London Subdues the East Saxons & captures London in open battle |
| 0776 | Battle of Otford | |
| Otford Egbert II defeats Offa near Sevenoaks , despite having a much smaller army |
| Otford Offa is forced to leave Kent for 9 years |
| 0777 | Capture of Powysland | |
| Mercia Captures Powys land |
| 0778 | Reform | |
| Mercia A new silver coin called the Sceatta is minted, becomes the Anglo Saxon coinage |
| 0779 | Battle of Bensington | |
| Bensington Strikes a crippling blow against Wessex in Oxfordshire |
| 0779 | Unification | |
| Mercia 1st Anglo Saxon King to call himself "Rex Anglorum", King of the English |
| 0780 | Offa's Dyke | |
| Offa's Dyke A border with the Welsh territories, extends from the Severn to the Dee Estuary |
| Offa's Dyke Completes 150 mile dyke from the Wye to the Dee |
| 0785 | Rule of Kent | |
| Kent Reasserts his right to Overlordship over Kent |
| 0786 | Diplomacy | |
| Mercia Holds the only council in the Anglo-Saxon period to be attended by papal legates |
| 0786 | Exile of Offa | |
| Mercia Drives the King of Kent's son, Egbert, into exile |
| 0787 | Annointment Egfrith | |
| Mercia Offa has his son Egfrith annointed as the next King to ensure his succession |
| 0787 | Bishopric of Lichfield | |
| Lichfield Pope Adrian I creates the Bishopric at Lichfield to challenge Canterbury |
| 0787 | Diplomacy | |
| The Pope recognizes Offa as the "King of the English" |
| 0787 | Rule of Mercia | |
| Mercia Has his son Egfrith made King of the Mercians |
| 0787 | Succession | |
| Mercia Offa has his son Egfrith annointed as the next King to ensure his succession |
| The Pope recognizes Offa as the "King of the English" |
| 0789 | Capture of Kent | |
| Kent Offa's Capture of Kent forces Egbert to live with Charlamagne until 802 |
| 0789 | Diplomacy | |
| Mercia Charlamagne closes Frankish ports to English merchants |
| 0789 | Invasion of Britain | |
| Dorchester 1st recorded Viking raid in Britain |
| 0789 | Siege of Dorchester | |
| Dorchester 1st recorded Viking raid in Britain |
| 0792 | Battle of Rhuddlan | |
| Rhuddlan Kills Caradoc, King of Gwinnedd, & many of the British nobility |
| 0793 | Assassination | |
| Tamworth Ethelbyrht is killed in Offa's court while selecting 1 of Offa's daughters as a bride |
| 0793 | Capture of East Anglia | |
| East Anglia East Anglia quickly submits to Mercian rule |
| 0793 | Martyrdom Alban | |
| Verulamium Offa establishes a monastery on the site where Alban was martyred |
| 0793 | Siege of Lindesfarne | |
| Lindesfarne The Vikings lay siege to Lindesfarne |
| 0794 | Death | |
| Mercia Has King Ethelbert of East Anglia beheaded |
| 0794 | Execution of Ethelbert | |
| Mercia Has King Ethelbert of East Anglia beheaded |
| 0794 | Siege of Jarrow | |
| Jarrow The Vikings lay siege to Jarrow |
| 0795 | Siege of Iona | |
| Iona The Vikings lay siege to Iona |
| 0796 | Alliance | |
| 29th July Mercia Allies with Charles of the Franks to protect merchants on both sides of the Channel |
| 0796 | Death | |
| 29th July Mercia Death of Offa |
| 29th July Mercia Marks the end of Mercian dominance in England & the beginning of the rise of Wessex |
| 0830 | Capture of Mercia | |
| Mercia Wins back Mercia from Egbert of Wessex who is weakened by Viking invasions |
