Hostilities broke out afresh at the beginning of the year 1625.

The Reformers complained that, instead of demolishing Fort Louis, which commanded La Rochelle, all haste was being made to complete the ramparts they had hoped to see razed to the ground: a small royal fleet mustered quietly at Le Blavet, and threatened to close the sea against the Rochellese.

The peace of Montpellier had left the Protestants only two surety-places, Montauban and La Rochelle; and they clung to them with desperation.

On the 6th of January, 1625, Soubise suddenly entered the harbor of Le Blavet with twelve vessels, and seizing without a blow the royal ships, towed them off in triumph to La Rochelle--a fatal success, which was to cost that town dear.
The royal marine had hardly an existence; after the capture made by Soubise, help had to be requested from England and Holland; the marriage of Henrietta of France, daughter of Henry IV., with the Prince of Wales, who was soon to become Charles I., was concluded; the English promised eight ships; the treaties with the United Provinces obliged the Hollanders to supply twenty, which they would gladly have refused to send against their brethren, if they could; the cardinal even required that the ships should be commanded by French captains.

"One lubber may ruin a whole fleet," said he, "and a captain of a ship, if assured by the enemy of payment for his vessel, may undertake to burn the whole armament, and that the more easily inasmuch as he would think he was making a grand sacrifice to God, for the sake of his religion." Meanwhile, Soubise had broken through the feeble obstacles opposed to him by the Duke of Vendome, and, making himself master of all the trading-vessels he encountered, soon took possession of the Islands of Re and Oleron and effected descents even into Medoc, whilst the Duke of Rohan, leaving the duchess his wife, Sully's daughter, at Castres, where he had established the seat of his government, was scouring Lower Languedoc and the Cevennes to rally his partisans.