Donnington Castle is located north of the town of
Newbury. It was garrisoned in 1643 for King
Charles I and commanded the road from
Oxford to
Southampton and the road from
London to
Bath. It was, from 1643, under the command of Lieutenant-Colonel John Boys, who spent £1,000 on earthworks to strengthen the defences. Boys commanded a division of the
Earl Rivers's Royalist Regiment consisting of 200 foot, 25 horse, and 4 guns, which remained throughout the siege. On 31 July 1644, Donnington Castle was attacked by a division of the
New Model Army of 3000 horses and dragoons, under the command of Lieutenant-General John Middleton, but without any artillery support. Middleton attempted to compel a surrender from Boys, but the Parliamentary army was repulsed with the loss of at least 300 men. About a month later, on 29 September, Colonel
Jeremy Horton began a 12-day blockade laying siege to Donnington, having raised a battery at the foot of the hill, near Newbury he was able to shatter the southern towers of the castles medieval defenses and reduce a part of the wall to rubble. It has been estimated that at least 1000 missiles were fired against the fortress during this engagement. Even though Colonel Horton had been reinforced, Governor John Boys refused to concede and even invited Horton to surrender his forces. A
parliamentarian army soon after returned on 4 October led by the
Earl of Manchester. An attempt to storm the castle failed, but the bombardment continued for several days without avail. Frustrated, the whole army dispersed as
Charles I, at the head of the Royal army, moved towards Donnington. For his great services in defense of the castle Governor John Boys was knighted on 21 October 1644. The king also promoted him to full colonel in Earl Rivers's Regiment. On 27 October, the
second battle of Newbury was fought, and Colonel Sir John Boys secured the king's artillery under the walls of Donnington castle. The famous Parliamentarian soldier Sir
William Waller surrounded the castle with his army and again Boys refused to surrender. After the battle of Newbury, when the king had gone to Oxford,
the Earl of Essex besieged Donnington Castle, but abandoned the attempt before Charles returned in the first week of November 1644 to relieve Donnington. The King took his "treasure and guns," leaving some of the heavier pieces for use by the garrison. Some time after 14 November 1645,
Oliver Cromwell himself turned his attention to the problem of the Royalist stronghold of Donnington castle, and in the following spring a furious bombardment with cannon and mortars was ordered. By 30 March a truce was concluded, and Charles had no option other than to instruct Boys to obtain the best possible surrender. On 1 April 1646, the surrender was completed, wherein garrison was permitted to march to the Royalist garrison at
Wallingford Castle with their colours flying and drums beating. Boys did not join them, instead he went to London rather than take part in any further military resistance. ==Later history==