A Celtic Time Line

B.C.

3000 Nomadic Indo-European warriors begin to colonise large areas of Europe, settling among New Stone Age farmers and Old Stone Age hunters in the north
2000 Stone henge built (?)
1800 Proto (meaning beginning or giving rise to) -Celts begin moving into western Europe
1600 Proto-Celts dominate the British Isles and the Atlantic coast of Iberia (The ones in Britain I believe become the Picts)
1200 "Urnfield" Celtic culture evolves, named after the fields of individual cremation urns corresponding to areas of Celtic settlement in middle Europe
1000 The "Urnfield" culture spreads into most of France at the expense of the earlier "Tumulus" culture of the Proto Celts
500 Celts migrate to Britain (The Picts were already there)
400 Celts invade Northern Italy, Iron Age La Tene culture begins its first phase these people are known to ancient writers as Gauls
390 Celts sacked Rome
341 Rome defeats Celts in Italy
279 Celts Sack Delphi in Greece
274 Celts were mercenaris are in the service of Greek and Egyptian armies
It is interesting to note that Ramses the II was very large for an Egyptian, and a red head
225 Celtic expansion begins to wane, Celts begin to move into Britain
105 Cimbri (possibly a Celtic Tribe) and Teutones (Germanic tribe) defeat Rome forces at Orange
102 Rome destroys the Cimbri and Teutones
100 Caesar Born
59 Caesar created as Govenor of Transalpine Gaul soon after the war with Gaul begins
55 Caesar invades Britain
52 Caesar defeats Vercingetorix at Alesia, Vercingetorix is taken back to Rome
50 Vercingetorix is strangled to death on the steps of the Senate in Rome
46 Caesar formally declared victorious over Gaul
44 Death of Caesar

A.D.

43 Britain made a Roman province
60-61 Boudicca's Revolt
69 Rome takes over southern Britain
60-197 Roman's were paying for peace with the Scotts (Rome had retreated to Hadrian's Wall at this time)
297 The Picts first documented appearance
400 Settlers from the Irish petty kingdom of Dál Riata were beginning to establishing themselves in what would later be called Scotland. Picts were well established north of other Celtic speakers except perhaps on the west coast and in the Hebrides
407 Rome withdraws from Britain
432 St. Patrick begins missionary work in Ireland
449 Anglo-Saxon Invasion
490 Enough Scotti were in place to allow them to move the seat of Dál Riata from across the Irish Sea
500 Departure of Roman legions in 407 left Britain to Picts, other Celtic speakers, and growing numbers of Irish settlers
537 Death of King Aurther (?)
597 St. Augustine founds Christian monestery at Canterbury, Kent
600 Colum Cille left Ireland and established a monastery on Iona
664 Synod of Whitbyu establishes Roman Church in England
792 Vikings attack Lindisfarne
843 Scottish Ruller Kenneth MacAlprin unites Scotts & Picts