On the outbreak of the War of the Spanish Succession in 1701, an English expeditionary force of thirteen regiments was sent to the Netherlands. A second force followed in early 1702, which included the Cameronians, and both groups joined a large allied army under the command of the Duke of Marlborough, when war was declared in May. Through 1702 and 1703 the army took a number of towns by siege, though the Cameronians' participation is not recorded in any of these events; they were, however, to be fully engaged the following year. They assembled for the 1704 campaign at Bedburg in the middle of May, and in early July a detachment was part of the main British attack at the Battle of Schellenberg. Of the hundred and thirty men involved, nineteen were killed and sixty-two wounded. The regiment then fought at the Battle of Blenheim in July, where it saw additional duty the following night guarding some of the thirteen thousand men taken prisoner. The British force was withdrawn to the Netherlands in October, where it went into winter quarters.