Charles made the Treaty of Brussels with Spain in 1656. This gathered Spanish support for a restoration in return for Charles's contribution to the war against France. Charles raised a ragtag army from his exiled subjects; this small, underpaid, poorly-equipped and ill-disciplined force formed the nucleus of the post-Restoration army. The Commonwealth made the Treaty of Paris with France in 1657 to join them in war against Spain in the Netherlands. Royalist supporters in the Spanish force were led by Charles's younger brother James, Duke of York. At the Battle of the Dunes in 1658, as part of the larger Spanish force, Charles's army of around 2,000 clashed with Commonwealth troops fighting with the French. By the end of the battle Charles's force was about 1,000 and with Dunkirk given to the English the prospect of a Royalist expedition to England was dashed.