Sir William Waller (c. 1597 – 1668) was an English Parliamentary general during the English Civil War. He received a knighthood in 1622 after taking part in Vere’s expedition to the Electorate of the Palatinate.
As a strict Presbyterian by religion, and a member of the opposition in politics, he became a prominent supporter of the cause of Parliament when the Civil War broke out in 1642. He immediately received an appointment as a colonel, and successfully concluded the Siege of Portsmouth in September 1642; later in the year he commanded the forces that captured Farnham, Winchester and other key locations in the south-west of England.
- Wikipedia for background.