Complex sentence: On 3 July, in an attempt to bring the protracted blockade to an end, Jervis ordered a bombardment of the town of Cadiz which ended in the capture of two Spanish mortar boats but achieved little else.
Split into simpler sentences: On 3 July Jervis attempted to bring the protracted blockade by ordering a bombardment of the town. The action resulted in the capture of two Spanish mortar boats but achieved little else.