At the Battle of Ludford Bridge Trollope commanded part of the Yorkist army of Richard of York, 3rd Duke of York, but betrayed him to the Lancastrians bringing with him 'valuable intelligence' regarding York's army.
It was fought at Hedgeley Moor, north of the village of Glanton in Northumberland, between a Yorkist army led by John Neville, 1st Marquess of Montagu and a Lancastrian army led by the Duke of Somerset.
Around nine in the morning of 16 June, King Henry's forward troops, commanded by the Earl of Oxford, encountered the Yorkist army assembled in a single block, on a brow of Rampire Hill surrounded on three sides by the River Trent at the village of East Stoke.
Apart from Lord Howth, who had a connection by marriage to the new Tudor dynasty, almost all the nobility associated with the Brotherhood supported the claims of the Yorkist pretender Lambert Simnel, and some of them followed him to his crushing defeat by Henry VII at the Battle of Stoke in 1487.
It was particularly strong in Coventry which supported the House of Lancaster during the Wars of the Roses, and which in 1456 was home to Queen Margaret, wife of Henry VI, who moved the court there as London grew increasingly Yorkist in sympathy.
In 1487 East Stoke was the scene of possibly the bloodiest battle in British history: the Battle of Stoke Field between Yorkist rebels (supported by largely Irish and Swiss mercenaries) facing the army of Henry VII.
William Crayford led a contingent of Kent men in the Wars of the Roses on the Yorkist side.
During the 15th century Wars of the Roses, Harlech was held by the Lancastrians for seven years, before Yorkist troops forced its surrender in 1468, a siege memorialised in the song Men of Harlech.
Sir William Oldhall, the Lord of the Manor at the time, is known to have been a zealous Yorkist.
Fogge married firstly, by the early 1440s, Alice de Criol or Kyriell, daughter of the Yorkist Sir Thomas de Criol of Westenhanger, beheaded after the Second Battle of St Albans by order of Margaret of Anjou.
Margaret was the first wife of Sir William Bonville, later the 1st Baron Bonville who was decapitated by Queen consort Margaret of Anjou following the Yorkist defeat at the Second Battle of St Albans.
Guto was also a soldier who fought on the Yorkist side during the War of the Roses, but spent his last years as a lay guest at the Cistercian abbey of Valle Crucis, near Llangollen.
The following year a Lancastrian army besieged the castle for eighteen days until it was relieved by Yorkist forces.
The most romantic story has it that on the eve of the Battle of Hexham in 1464, Yorkist foot soldiers demanded their beer be brewed again because it lacked its usual fighting strength.
The main business of the Parliament was to pass bills of attainder for High treason against the leading Yorkist nobles, following the start of a new stage in the Wars of the Roses and the Battle of Ludford Bridge.
During the Wars of the Roses, Queen Margaret, the wife of Henry VI, made an agreement with Pierre de Brézé, Comte de Maulevrier, the seneschal of Normandy, to raise an army, in aid of the Lancastrian cause, to capture Jersey and in the process to provide a refuge if it should be needed in the event of Yorkist success.
Richard Neville, 5th Earl of Salisbury (1400–1460), Yorkist leader during the Wars of the Roses (1455–1485), father of the 16th Earl of Warwick
Poynings was slain on 17 February 1461 while fighting on the Yorkist side at the Second Battle of St Albans.
In the portrait he and his wife wear lavish Yorkist gold collar chains of suns and roses with the personal livery of Edward in pendants of his emblem, a lion, both in white ronde bosse enamel with gold highlights, clutching a ruby in their raised paws.
The Yorkist commander, later Edward IV of England, convinced his initially frightened troops that it represented the three sons of the Duke of York, and Edward's troops won a decisive victory.
William survived the Yorkist defeat at the Battle of Wakefield, but was executed on 17th February 1461 immediately after the Second Battle of St Albans by the troops of the Queen consort, Margaret of Anjou, who headed the Lancastrian faction.