This page chronicles the history of the British Brittany alhist from 1200 to 1250.
- 1200-1204: England and France recover from their war from 1194 to 1199, and prepare for another war.
- 1203: Eleanor of Aquitaine, mother of the English king Geoffrey I, died. Later that same year, Geoffrey's wife, Queen Constance, died. After these deaths, especially the second, King Geoffrey fell into a depression and left much of running his various lands to his son Arthur and others.
- 1204: War began again between England and France. Neither kingdom had been exhausted by their last war, and a vaguely defined border in Aquitaine (an English possession) provided a spark to begin another war. England's armies were not headed by King Geoffrey, however; instead his son Arthur commanded the main army on the Continent.
- 1205: Geoffrey I of England died from illness after only nine years of rule. His son Arthur was still in France, and consequently was crowned King Arthur I in a short ceremony in a castle somewhere in Aquitaine.
- 1206: Arthur I marries Sanchia of Leon, the stepdaughter of his cousin, Berengaria of Castile and Leon.
- 1209: The Albigenesian Crusade starts, the Aragonese don't help, the Tolosan patrons of the Albignesians are defeated by the French, the Aragonese expel and execute heretics in their lands in South of Gaul and Iberia.
- 1209: A decisve French victory in Aquitaine brought this region under French control. However, a string of English victories in the north allowed them to solidify their control over Normandy and Brittany.
- 1210: Arthur I took a break from the war, and returned to England. While here, he consummated his marriage with Sanchia.
- 1211: Arthur's son, Geoffrey, was born. Arthur returned to the war.
- 1217: After more than a decade of war with no decisive conclusion one way or another, Arthur I and Philip II met and ended the war. Aquitaine was ceded to France; however England kept their remaining continental territories (mainly Brittany and Normandy).
- 1219: Facing some unruly barons in England angry about the result of the war, King Arthur signed the Carta Regis, or the Charter of the King (TTL's analogue to the Magna Carta, but vastly different; instead of limiting the king's power, it largely confirmed it, aside from the creation of a council of nobles which could countermand the king in very specific instances, such as going against the pope's wishes).
- 1224: Philip II of France died. His son, Louis, was crowned Louis VIII of France.
- 1227: The beginning of the Welsh War, in which the English attacked the less powerful Welsh. The Welsh, under Llywelyn ab Iorwerth, had a hard time defending themselves, and by the end of the war in 1231, Llywelyn had died and left Wales to his son Dafydd ap Llywelyn.
- 1231: The Welsh War ended, with Dafydd ap Llywelyn surrendering to the English and becoming a vassal of King Arthur of England. However, resistance continued, mostly organised by Llywelyn ab Iorwerth's illegitimate son Gruffydd ap Llywelyn. (This earlier conquest of Wales was possible because England was stronger than it was OTL.) After the Welsh War, King Arthur controlled England, Wales, Brittany, Normandy and Ireland.
More to come...