It had been the intention of Wellington to operate next against Soult, and drive him, if possible, from Esdremadura and Andalusia. But, as appears from one of his despatches to Lord Liverpool, he was ill satisfied with the conduct of his allies guarding Ciudad Rodrigo, and returned to resume command in that region. In the same despatch he complains bitterly of the niggardly policy of his government in regard to money and supplies. The same timidity on the part of ministers at home appears in a letter from Liverpool, almost forbidding him to accept the command-in-chief of the Spanish armies, which, however, was conferred upon him later in this year.[49] At present, he decided to march against Marmont in the plains of Leon. This movement was facilitated by the success of Hill in surprising a body of French troops, and seizing the important bridge of Almaraz over the Tagus on May 19, thereby breaking the French lines of communication and isolating Marmont's army for a time. Soon afterwards, Salamanca and its forts were captured by Wellington, but Marmont proved a very formidable opponent, and, having behind him another army under King Joseph, threatened the British lines of communication. In the series of manoeuvres which ensued, Wellington's forces met with more than one reverse, but the French marshal was determined to win a victory on a large scale. Wellington had no wish to risk a battle, unless Salamanca or his own rear should be seriously threatened, and he stood on the defensive, a little south of Salamanca, with Marmont's army encamped in front of him.