1259    Kings Louis IX of France and Henry III of England agree to the Treaty of Paris, in which Henry renounces his claims to French-controlled territory on continental Europe (including Normandy) in exchange for Louis withdrawing his support for English rebels.

1419    Hundred Years' War: Rouen surrenders to Henry V of England completing his reconquest of Normandy.

1944    World War II: More than 1000 British bombers drop 5,000 tons of bombs on German gun batteries on the Normandy coast in preparation for D-Day.

1944    World War II: Battle of Normandy begins. D-Day, code named ''Operation Overlord'', commences with the landing of 155,000 Allied troops on the beaches of Normandy in France. The allied soldiers quickly break through the Atlantic Wall and push inland in the largest amphibious military operation in history.