sentences:  On 13 November the main Parliamentary army under the command of Earl of Essex's heavily reinforced with the London trainbands and other London citizenry, assemble as an army of about 24,000 on Chelsea Field and advanced to Turnham Green in the vicinity of the main body of the Royalist army.At a standoff known as the Battle of Turnham Green, the senior Parliamentarian officers not trusting the training of their forces in a battle of manoeuvre chose not to attack, and the King decided not to press his advance on London by giving battle against a greater force.He decided, as it was near the end of the campaigning season, to retreat to Oxford where his army could be billeted over the winter.