 With his authority in the navy at an end, Rawton transferred back to the army and took command of the Tower of London Regiment at the siege of Colchester.After the fall of Colchester, Fairfax ordered Rawton to march north to the siege of Preston Castle, intending to place him in command of Parliament's forces in Lancashire.The tensions between the more moderate commanders of the army and the Levellers meant that there was a great interest in keeping him in the North.