This page chronicles the history of the British Brittany alhist from the PoD in 1186 to the end of the twelfth century in 1200.
- 1186: Geoffrey, Duke of Brittany and son of King Henry II of England, narrowly avoided death in a jousting tournament in Paris.
- 1187: Geoffrey started a rebellion against the Henry II, but this fails. Geoffrey's first son, Arthur, is born.
- 1189: King Henry II died. His eldest surviving son, Richard, became Richard of England, or Richard the Lionhearted. Also, Geoffrey's second son William was born.
- 1190: King Richard set off on a crusade to the Holy Land with the French King Philip II. He stopped in Sicily and signed a treaty with King Tancred of Sicily and King Philip of France, a part of which included the recognition of Geoffrey, Duke of Brittany, as Richard's heir.
- 1191: When word of this treaty reached England, John, who hoped to be named heir, revolted and tried to establish himself as king. Geoffrey was able to put down the rebellion, and killed John. (Note: Obviously John did not die OTL, as he later became king.) The details of Richard's crusade are the same as OTL.
- 1192: As the events of the crusade went the same, Richard was captured on his way back to England by a duke near Vienna.
- 1193: Geoffrey meets with the Holy Roman Emperor, who was holding Richard prisoner, and convinces him to release Richard for about half the ransom that the Emperor had originally demanded.
- 1194: Richard is finally released, and Geoffrey's help assures his place as heir to Richard. King Philip II of France, on the other hand, had tried to pay the Holy Roman Emperor to hold Richard longer, and thus Richard decided to go to war on Philip.
- 1196: Richard dies in a battle in France. It is unclear how, but some theories include betrayal by his brother Geoffrey, or simply being hit by French arrows. After the battle, Geoffrey proclaimed himself Geoffrey I of England, with his son Arthur his heir. However, Geoffrey proved to be an inferior commander to Richard, and the tide of the war turned against the English.
- 1197: Geoffrey's eldest daughter Eleanor marries Peter II of Aragon making England and Aragon allies.
- 1199: Geoffrey I and Philip II met in London to end the war. The following treaty let England keep Aquitane, Brittany, and Normandy, while the rest of the territory on the continent was taken by France. To seal the treaty Geoffrey's second daughter Matilda was married to Philip's son Louis, later Louis VIII.