 The centre was organised as three infantry tertias (brigades) commanded by Lord Astley, with a regiment of horse under Colonel Howard in support.On the left were 1,500 "northern horse" (cavalry recruited from the northern counties of England, who continued to fight even after their homes were overrun by Scottish Covenanters and Parliamentarians) commanded by Sir Marmaduke Langdale.The King commanded a small reserve, consisting of his own and Rupert's regiments of foot (800 in total) and his lifeguard of horse.