802: Iona raided by Vikings who burn down the wooden Columban monastery.
806: The monasteries on Iona are attacked again by Vikings. 68 monks are slaughtered at Martyr's Bay.
Martyr's Bay Iona - much more
820: Death of Caustantn mac Fergusa.
829: Abbot Diarmait, abbot of Iona, goes to Alba with relics of St Columba
831: Diarmait of Iona goes to Ireland with relics of St Columba
839: Eganan mac Oengusa and his brother Bran killed in battle with Vikings, end of dominance of Fortriu.
843: Kenneth mac Alpin unites the Scots and Picts as one nation.
Kenneth mac Alpin ( Kenneth MacAlpin
858: Death of Kenneth mac Alpin, King of the Picts.
870: Alt Clut - Dumbarton Rock - captured by the Norse-Gael or Viking leaders Amlab Conung and Imar after six month's of siege
878: Kenneth mac Alpin's son Aed killed; Giric becomes king.
889: Death of Giric; Domnall mac Causantn, grandson of Kenneth, becomes king.
c.890: Exodus of the Strathclyde Britons to Gwynedd (Wales).