Forfeit Marquessates of England is in Marquessates of England.
1450 Murder of William de la Pole
14th April 1471 Battle of Barnet
In 1399 John Beaufort 1st Marquess Somerset and Dorset [aged 26] was degraded in his titles: Marquess Somerset, Marquess Dorset forfeit. by King Henry V of England [aged 12] as a consequence of his having been a counter-appellant i.e. a supporter of King Richard II who opposed the Lords Appellants.
Before 1st May 1450, the day he was murdered, William "Jackanapes" de la Pole 1st Duke of Suffolk [aged 53] was impeached, and sentenced to the exiled. Duke Suffolk, Marquess Suffolk, Earl Pembroke forfeit.
On 4th November 1461 Henry Beaufort 2nd or 3rd Duke of Somerset [aged 25] was attainted. Duke Somerset, Marquess Dorset, Earl Somerset, Earl Dorset forfeit.
On 15th May 1464 a Yorkist army commanded by John Neville 1st Marquess Montagu [aged 33] defeated a Lancastrian army commanded by Henry Beaufort 2nd or 3rd Duke of Somerset [aged 28] at Hexham, Northumberland [Map].
Those fighting for York included John Stafford 1st Earl Wiltshire [aged 36], John Scrope 5th Baron Scrope of Bolton [aged 26] and Richard Welles 7th Baron Welles, Baron Willoughby [aged 36].
Henry Beaufort 2nd or 3rd Duke of Somerset was beheaded following the battle. The general pardon which he has previously received was annulled. Duke Somerset, Marquess Dorset, Earl Somerset and Earl Dorset forfeit for the second time. His son Edmund Beaufort [aged 25] was styled by supporters of the House of Lancaster as Duke of Somerset but had not right to do so.
Philip Wentworth [aged 40] was executed at Middleham [Map].
Thomas Ros 9th Baron Ros Helmsley [aged 36] and Robert Hungerford 3rd Baron Hungerford 1st Baron Moleyns [aged 33] fought for the Lancastrians.
On 14th April 1471 Edward IV [aged 28] commanded at the Battle of Barnet supported by his brothers George [aged 21] and Richard [aged 18], John Babington [aged 48], Wiliam Hastings [aged 40] (commanded), Ralph Hastings, William Norreys [aged 30], William Parr [aged 37], John Savage [aged 49], William Bourchier Viscount Bourchier [aged 41], Thomas St Leger [aged 31], John Tuchet 6th Baron Audley, 3rd Baron Tuchet [aged 45], Thomas Burgh 1st Baron Burgh of Gainsborough [aged 40], John Scott [aged 48] and Thomas Strickland.
The Yorkists William Blount [aged 29], Humphrey Bourchier [aged 36], Henry Stafford [aged 46] and Thomas Parr were killed.
Humphrey Bourchier 1st Baron Cromwell [aged 40], was killed. Baron Cromwell extinct.
The Lancastrians...
Warwick the Kingmaker [aged 42] was killed. Earl Salisbury, Baron Montagu, Baron Montagu and Baron Monthermer forfeit on the assumption he was attainted either before or after his death; the date of his attainder is unknown. If not attainted the titles may have been abeyant between his two daughters Isabel Neville Duchess Clarence [aged 19] and Anne Neville Queen Consort England [aged 14].
John Neville 1st Marquess Montagu [aged 40] was killed. Marquess Montagu, Baron Montagu forfeit; unclear as to when he was attainted. He was buried at Bisham Abbey [Map].
William Tyrrell was killed.
William Fiennes 2nd Baron Saye and Sele [aged 43] was killed. His son Henry [aged 25] succeeded 3rd Baron Saye and Sele. Anne Harcourt Baroness Saye and Sele by marriage Baroness Saye and Sele.
Henry Holland 3rd Duke Exeter [aged 40] commanded the left flank, was badly wounded and left for dead, Henry Stafford and John Paston [aged 27] were wounded, John de Vere 13th Earl of Oxford [aged 28] commanded, and John Paston [aged 29] and William Beaumont 2nd Viscount Beaumont [aged 33] fought.
Robert Harleston [aged 36] was killed.
Thomas Hen Salusbury [aged 62] was killed.
Thomas Tresham [aged 51] escaped but was subsequently captured and executed on the 6th of May 1471.
On 30th April 1513 Edmund Pole 3rd Duke of Suffolk [aged 42] was beheaded at Tower Hill [Map] on the instruction of King Henry VIII after having been imprisoned for seven years. Duke Suffolk, Marquess Suffolk and Earl Suffolk, Baron Pole forfeit.
He, Edmund, was the son of Elizabeth York Duchess Suffolk, sister of Kings Edward IV and Richard III, and George, Duke of Clarence. He, arguably, had a better claim to the throne of England than King Henry VII if King Edward IV's children were illegitimate, and George's children barred from the succession as a consequence of George'a attainder although Anne St Leger's [aged 37] claim better since she descended from an older sister Anne.
He, Edmund, had been given to King Henry VII of England and Ireland as part of the treaty of Malus Intercursus aka Evil Treaty with the condition that he not be executed. King Henry VII in his will instructed his son King Henry VIII to have him executed; an act which attracted the criticism of Montaigne in Chapter 7 of his Essays.
On 9th December 1538 at Tower Hill [Map]:
Edward Neville [aged 67] was beheaded
Henry Courtenay 1st Marquess Exeter [aged 42] was beheaded with a sword. Marquess Exeter, Earl Devon, Earl Devon, Baron Okehampton forfeit as a consequence of his attainder.
Henry Pole 1st Baron Montagu [aged 46] was beheaded
On 23rd February 1554 Henry Grey 1st Duke of Suffolk [aged 37] was beheaded at Tower Hill [Map]. Duke Suffolk, Marquess Dorset, Earl Huntingdon, Baron Ferrers of Groby, Baron Harington, Baron Bonville forfeit.
Dean Hugh Weston [aged 49] acted as Confessor.