During the 1450s, English politics become increasingly partisan and factional, with intermittent rises in violence and local disorder. Jack Cade's rebellion in 1450—directly aimed at royal favourites like de la Pole—explicitly named Mowbray as one of the King's "natural counsellors" necessary to reform the realm. Even so, Mowbray was part of a major royal army which eventually defeated the rebels. During the next crisis—the near-rebellion of
Richard of York in Autumn 1450—Mowbray took York's side against the new royal favourite,
Edmund Beaufort, Duke of Somerset. York canvassed Mowbray for support, as he was one of the few nobles openly critical of the court. For the former, this was a logical alliance as Mowbray was as bitter an enemy of Somerset as York was. Mowbray gathered his forces at Ipswich on 8 November (having ordered
John Paston to meet him there "with as many clenly people as ye may get"), and may have travelled into London with York, who had also recruited locally. Thus, when he arrived for the parliament it was with a large, heavily armed force. Mowbray was appointed, with the Duke of York and
Earl of Devon, to maintain law and order in the City of London for the duration of the parliament, though his retinue caused as much trouble as it prevented. On 1 December, they joined with York's force and attacked Somerset's house in
Blackfriars. The battle led to the beleaguered duke seeking refuge in the Tower of London in
for his own protection. Two days later the King and his magnates rode through London with up to 10,000 men; Mowbray rode ahead with a force of 3,000. The display was carefully designed to quell any remnants of support for Cade's rebels. Mowbray's alliance with York was intermittent. York again rebelled in 1452, confronting a royal army at
Dartford when Mowbray was with the King. For his service, he received £200 and a gold cup. York may have abandoned the alliance because of his objection to Mowbray's violent behaviour in East Anglia at a time when York was presenting himself as a candidate of law and order. Mowbray's campaign against Somerset, meanwhile, continued unabated. In 1453, with the King incapacitated and York
protector, Mowbray presented charges against Somerset in
parliament, attacking his failure to prevent the loss of the "two so noble Duchies of Normandy and Guyenne" in France. Somerset was imprisoned in the Tower for the next year. In April 1454, Mowbray was asked to join the York's regency
council, and although he swore loyalty to York's government, claimed to be too ill to attend. The King recovered his health early in 1455 and the protectorate came to an end. Somerset was released from the Tower and as a result, according to historian
Ralph Griffiths, Mowbray may have ("quite rightly" he says) feared for his own safety.
Wars of the Roses ; both Mowbray and his arch-enemy Suffolk were imprisoned here at different stages of their careers.Following the collapse of the 1454–55 protectorate, the Yorkist lords retreated to their estates, and Mowbray distanced himself from factional politics. An uneasy peace existed between the court and the Yorkists until April 1455, when the King summoned a Great Council to meet at
Leicester the following month. The Duke of York feared that the purpose of this council was to destroy him; several chroniclers of the day suggest that Somerset was poisoning the King's mind against York. The duke and his Neville allies proceeded to raise an army from their northern estates. The King and a small force left London on 20 May; the Yorkists approached from the north with a speed calculated to surprise. In a
pre-emptive strike, York and his allies intercepted the King at the
first Battle of St Albans. Mowbray managed to avoid involvement in the fighting, even though, as Earl Marshal, his
heralds were used during negotiations between the two camps. It is uncertain at what point Mowbray joined the battle, or if he even reached the King in time to take part. The fighting lasted only a short time, and though there were very few fatalities among the soldiery, Henry Percy, the 2nd Earl of Northumberland, (father of the 3rd
Earl of Northumberland), the Duke of Somerset and
Lord Clifford were killed. They were not only three of the King's most loyal supporters, but Percy and Somerset at least were bitter enemies of the Nevilles and York. After the battle, Mowbray threatened to hang the
Royal Standard bearer,
Sir Philip Wentworth, on hearing that Wentworth "cast it down and fled" the battlefield. Whatever part, if any, Mowbray played in the fighting, by now contemporaries viewed him as being sympathetic to York. It is likely that Mowbray was deliberately vacillating. He did not attend York's victory parliament in 1455, and might have gone on pilgrimage: he is known to have walked to
Walsingham in 1456, and over the next two years may have travelled to
Amiens, Rome or even
Jerusalem. After four years of peace, the civil war resumed in September 1459 when the Yorkist
Earl of Salisbury fought off a royal ambush at the
Battle of Blore Heath. Salisbury won that battle but was defeated soon after with the Duke of York at the
Battle of Ludford. The Yorkists escaped into exile. Mowbray had taken neither side, but with the Yorkists exiled, when
a parliament was called at
Coventry, Mowbray attended. Here the Yorkists were
attainted, and on 11 December 1459 Mowbray took an oath of loyalty to keep Henry VI on the throne. He received several royal commissions in the final months of
Lancastrian rule. The Nevilles and Earl of March spent their exile in Calais, while York and his other son,
Edmund, Earl of Rutland, retired to
Dublin. The Nevilles returned to England in June 1460. They were admitted into London, where they could plan an assault on the King's army, then based in Northampton. On 10 July the Yorkist army under Warwick and March defeated the royalist army at the
Battle of Northampton, and once again the King was captured.
Colin Richmond describes Mowbray as "more likely to have observed from a safe distance than participated" in it. York returned from exile in October 1460, and much to the frustration of his allies, made claim to the throne. Mowbray's reaction is uncertain as the chroniclers omit mention of him, but some historians note how Mowbray sided with them during the Yorkists' return from exile. The exact cause of his change of loyalty is unknown. Colin Richmond argues that the Lancastrian defeat at Northampton in June 1460 was fundamental, and Mowbray lost friends and colleagues. It is possible that King Henry's capture there encouraged him to desert the King.
Christine Carpenter puts it down almost solely to Mowbray's failure to improve his position in Norfolk under Henry, while Castor points to the October 1460 Yorkist parliament being the turning point for Mowbray: possibly he believed that the attempted settlement contained in the
Act of Accord was the best possible outcome. The King and Queen still had the support of much of the nobility and withdrew to the north to commence a campaign of ravaging York and the Nevilles' estates. This forced York, Salisbury and Rutland, to move north on 9 December to suppress the Lancastrians. Mowbray remained in London with Salisbury's and York's sons, the Earls of
Warwick and March. York and Salisbury's expedition ended in disaster. Choosing to engage a Lancastrian army outside the duke's castle at
Sandal, the Yorkists were crushed at the
Battle of Wakefield on 30 December. York, Rutland and Salisbury, died in or soon after the battle. The Queen's army made its way south towards London. Mowbray, Warwick and his brother
John Neville, Lord Montagu, marched north to intercept the approaching Lancastrians. Mowbray brought King Henry with them. The armies clashed on 17 February 1461 outside St Albans, where the Yorkists
were defeated. Mowbray and Warwick abandoned the King to his wife and her supporters, and retreated to London before the victorious Lancastrian army could reach the city.
Battle of Towton The Lancastrian army marched on London, but were refused entry. On 3 March 1461 Mowbray attended a
great council at
Baynard's Castle, organised a small group of Yorkist loyalists, and agreed to offer
Edward, Earl of March the throne. The following day—indicating the urgency for resolution felt by the Yorkists by this stage—Mowbray was sent to East Anglia to "prepare for the war on the party of King Edward". The Lancastrian army had returned to the north where, on 29 March 1461, York and Lancaster met at the
Battle of Towton. It was to be one of the longest and bloodiest battles fought on British soil, and "fought in bitter Yorkshire weather and no less bitter spirit", according to historian
Charles Ross. On Mowbray's advice, Edward followed the Lancastrian army north with a new army. Mowbray seems to have recruited successfully; one of the
Paston letters mentions that "every town hath waged and sent forth." Mowbray left East Anglia via
Cambridge on 17 March 1461, where he joined forces with
Sir John Howard, his cousin and retainer. Mowbray's army may have constituted elements of the Yorkist
rearguard, as such not part of the main army, and were intending to join with it later. He was still not with Warwick's and March's
council of war at
Doncaster in late March. There are different explanations for the delay. He may have faced difficulty in
mustering troops; the army recently raised to fight at St Alban's had been dispersed and this would require re-mustering. It is likely that—since he died only a few months later—Mowbray was too ill to keep up with the main Yorkist force. At
Pontefract Mowbray transferred command to Howard, knowing that time was of the essence for the Yorkists and while he was with them, his soldiers could only march as quickly as he could. If Mowbray was ill, then it is unlikely that he fought personally; Boardman observed that "a sick man would never have survived such a strength-sapping ordeal, especially a noble in armour-plate." If his contingent was tasked with bringing up Yorkist artillery, which would have further slowed them down and they may have abandoned armoury en route to increase their speed. Mowbray arrived late but at a crucial point of the battle. His prolonged absence after a day's bitter fighting must have been a worry for the Yorkists, especially as they may have thought him up to a day's march away. Mowbray's absence presented an acute problem for them;
Philip A. Haigh describes them, by four o'clock in the afternoon, as doomed without him. There must have been much messaging between Edward and Mowbray throughout the day, but
battle fatigue had almost certainly set in on both sides by the time Mowbray's troops arrived on the eastern edge of the battlefield. A contemporary chronicler described the situation thus Mowbray launched a decisive attack on the Lancastrian
flank, turning them left. His arrival both reinvigorated the Yorkist army and crushed Lancastrian morale with his surprise attack and led rapidly to a Lancastrian
rout to give the victory to Edward IV. == Under the Yorkists ==