
F. Jaffrennou (Taldir), Breton writer, born
François-Joseph-Claude Jaffrennou (15 March 1879 - 23 March 1956) was a Breton language writer and editor. He was a Breton nationalist and a neo-druid bard. He is also known as François Taldir-Jaffrennou, since he also used the bardic name Taldir (“Wall of Steel”). He was one of the pioneers of the Breton autonomist movement.

Last meeting of the Breton National Assembly
The Breton National Assembly, also known as the Estates of Brittany (États de Bretagne), was a historical legislative body in the Duchy of Brittany, which existed before the region was formally incorporated into the Kingdom of France. The last meeting of the Breton National Assembly took place in the 18th century.

Dutchess Anne, duchess of Brittany, died
Anne of Brittany, (1477–1514) duchess of Brittany and twice queen consort of France, who devoted her life to safeguarding the autonomy of Brittany within the kingdom of France.

Yann V becomes Duke of Brittany, providing 43 years of economic prosperity and artistic creativity
John V, sometimes numbered as VI, (24 December 1389 – 29 August 1442) bynamed John the Wise (Breton: Yann ar Fur ; French: Jean le Sage), was Duke of Brittany and Count of Montfort from 1399 to his death. His rule coincided with the height of the Hundred Years’ War between England and France. John’s reversals in that conflict, as well as in other internal struggles in France, served to strengthen his duchy and to maintain its independence.

Second treaty of Guerande between Yann IV of Brittany & Charles VI of France recognizes Breton Independence
The second Treaty of Guérande (1381) established Brittany’s neutrality in the Anglo-French conflict, and was accorded between Duke John V of Brittany and King Charles VI of France.