Complex sentence: The British devised a plan to ambush some of these destroyers on their regular daily patrols, and a fleet of 31 destroyers and two cruisers under Commodore Reginald Tyrwhitt and submarines commanded by Commodore Roger Keyes was dispatched.
Split into simpler sentences: The British devised a plan to ambush some of these destroyers on their daily patrols. A British fleet of 31 destroyers and two cruisers under Commodore Reginald Tyrwhitt and submarines commanded by Commodore Roger Keyes was dispatched.