The war began in 1337 and ended in 1453; the epochs in it are the Treaty of Bretigny in 1360, the Treaty of Troyes in 1422, the final expulsion of the English in 1453.
The French King seems to have believed himself equal to the burdens of a great war, and able to carry out the most far-reaching plans. The Pope was entirely in his hands, and useful as a humble instrument to curb and harass the Emperor. Philip had proved himself master of the Flemish, and, with help of the King of Scotland, hoped so to embarrass Edward III. as to have no difficulty in eventually driving him to cede all his French possessions. While he thought it his interest to wear out his antagonist without any open fighting, it was Edward's interest to make vigorous and striking war. France therefore stood on the defensive; England was always the attacking party. On two sides, in Flanders and in Brittany, France had outposts which, if well defended, might long keep the English power away from her vitals. Unluckily for his side, Philip was harsh and raw, and threw these advantages away. In Flanders the repressive commercial policy of the Count, dictated from Paris, gave Edward the opportunity, in the end of 1337, of sending the Earl of Derby, with a strong fleet, to raise the blockade of Cadsand, and to open the Flemish markets by a brilliant action, in which the French chivalry was found powerless against the English yeoman-archers; and in 1338 Edward crossed over to Antwerp to see what forward movement could be made. The other frontier war was that of Brittany, which began a little later (1341).
The openings of the war were gloomy and wasteful, without glory. Edward did not actually send defiance to Philip till 1339, when he proclaimed himself King of France, and quartered the lilies of France on the royal shield. The Flemish proved a very reed; and though the French army came up to meet the English in the Vermando country, no fighting took place, and the campaign of 1339 ended obscurely. Norman and Genoese ships threatened the southern shores of England, landing at Southampton and in the Isle of Wight unopposed. In 1340 Edward returned to Flanders; on his way he attacked the French fleet which lay at Sluys, and utterly destroyed it. The great victory of Sluys gave England for centuries the mastery of the British channel. But, important as it was, it gave no success to the land campaign. Edward wasted his strength on an unsuccessful siege of Tournia, and, ill-supported by his Flemish allies, could achieve nothing. The French King in this year seized on Guienne; and from Scotland tidings came that Edinburgh castle, the strongest place held by the English, had fallen into the hands of Douglas. Neither from Flanders nor from Guienne could Edward hope to reach the heart of the French power; a third inlet now presented itself in Brittany. On the death of John III. of Brittany, in 1341, Jean de Montfort, his youngest brother, claimed the great fief, against his niece Jeanne, daughter of his elder brother Guy, Comte de Penthievre. He urged that the Salic law, which had been recognised in the case of the crown, should also apply to this great duchy, so nearly an independent sovereignty. Jeanne had been married to Charles de Blois, whom John III. of Brittany had chosen as his heir; Charles was also nephew of King Philip, who gladly espoused his cause. Thereon Jean de Montfort appealed to Edward, and the two Kings met in border strife in Brittany. The Bretons sided with John against the influence of France. Both the claimants were made prisoners; the ladies carried on a chivalric warfare, Jeanne de Montfort against Jeanne de Blois, and all went favourably with the French party till Philip, with a barbarity as foolish as it was scandalous, tempted the chief Breton lords to Paris and beheaded them without trial. The war, suspended by a truce, broke out again, and the English raised large forces and supplies, meaning to attack on three sides at once,--from Flanders, Brittany, and Guienne. The Flemish expedition came to nothing; for the people of Ghent in 1345 murdered Jacques van Arteveldt as he was endeavouring to persuade them to receive the Prince of Wales as their count, and Edward, on learning this adverse news, returned to England. Thence, in July, 1346, he sailed for Normandy, and, landing at La Hogue, overran with ease the country up to Paris. He was not, however, strong enough to attack the capital, for Philip lay with a large army watching him at St. Denis.
After a short hesitation Edward crossed the Seine at Poissy, and struck northwards, closely followed by Philip. He got across the Somme safely, and at Crecy in Ponthieu stood at bay to await the French. Though his numbers were far less than theirs, he had a good position, and his men were of good stuff;and when it came to battle, the defeat of the French was crushing. Philip had to fall back with his shattered army; Edward withdrew unmolested to Calais, which he took after a long siege in 1347.
Philip had been obliged to call up his son John from the south, where he was observing the English under the Earl of Derby; thereupon the English overran all the south, taking Poitiers and finding no opposition. Queen Philippa of Hainault had also defeated and taken David of Scotland at Neville's Cross.
The campaign of 1346-1347 was on all hands disastrous to King Philip. He sued for and obtained a truce for ten months. These were the days of the "black death," which raged in France from 1347 to 1349, and completed the gloom of the country, vexed by an arbitrary and grasping monarch, by unsuccessful war, and now by the black cloud of pestilence. In 1350 King Philip died, leaving his crown to John of Normandy. He had added two districts and a title to France: he bought Montpellier from James of Aragon, and in 1349 also bought the territories of Humbert, Dauphin of Vienne, who resigned the world under influence of the revived religion of the time, a consequence of the plague, and became a Carmelite friar.
