Of all the generals of the English Civil War, Sir William Waller (1597-1668) probably best expressed its tragedy, referring to it as 'this war without an enemy' when writing to his friend Sir Ralph Hopton, whom he faced across the battlefield. Despite this he was a successful general, earning the nickname 'William the Conqueror' and for his preference for night marches 'The Night Owl'. This book analyses the regiments that made up his second army, which became known as the Southern Association.