The Trained Bands and Auxiliaries of London and the suburbs did turns of duty manning the London fortifications, but were also sent on short campaigns outside the city. The Yellow Regiment of Southwark Trained Bands formed part of a City brigade that served with the Earl of Essex's army between October 1643 and January 1644. The Southwark White Auxiliaries under Col James Hobland set out on 9 April 1644 as part of a brigade commanded by Sir James Harington, MP, of the Westminster Trained Bands. It joined Waller's Army in May 1644 and participated in his defeat at the Battle of Cropredy Bridge on 29 June. After Waller's broken army reached Northampton on 4 July Colonel Hobland and Capt Francis Grove of the Southwark Auxiliaries died of sickness, and the demoralised regiment deserted, taking the bodies of Hobland and Grove home for burial. The Southwark Yellow Regiment was called out again in October in a brigade under Harrington that reinforced the Earl of Essex's army. However, it was left in garrison at Reading, Berkshire, and missed the Second Battle of Newbury on 27 October. It afterwards served in the Second Siege of Basing House and returned to London on 14 December 1644. The White Auxiliaries served in a City brigade under Sir Richard Browne supporting the New Model Army's Siege of Oxford in 1645. A 'commanded party' of 100 musketeers from the White Auxiliaries was sent to assist the final siege of Basing House later that year. This ended the London Trained Bands' participation in the First English Civil War, but all the city and suburban regiments attended a great muster in May 1646. Both Southwark regiments paraded for the Earl of Essex's state funeral in Westminster Abbey in October 1646.