Duke Albemarle is in Dukedoms of England Alphabetically.
1385 Richard II Creates his Two Uncles as Dukes
1397 Murder of Thomas of Woodstock
There have been two creations of Duke Albemarle:
1st. 6th August 1385. Thomas of Woodstock 1st Duke of Gloucester. Forfeit. 8th September 1397. Murder of Thomas of Woodstock.
2nd. 29th September 1397. Edward 2nd Duke of York 1st Duke Albemarle. Extinct. 25th October 1415. Battle of Agincourt.
Summary
6th August 1385. 1st. Thomas of Woodstock 1st Duke of Gloucester [aged 30] created. See Richard II Creates his Two Uncles as Dukes.
8th September 1397. 1st. Thomas of Woodstock 1st Duke of Gloucester forfeit. See Murder of Thomas of Woodstock.
On 6th August 1385 Edmund of Langley 1st Duke of York [aged 44] was created 1st Duke York by King Richard II of England [aged 18]. Isabella of Castile Duchess York [aged 30] by marriage Duchess York.
Thomas of Woodstock 1st Duke of Gloucester [aged 30] was created 1st Duke Albemarle, and 1st Duke Gloucester. Eleanor Bohun Duchess Gloucester [aged 19] by marriage Duchess Albemarle and Duchess Gloucester.
Michael de la Pole 1st Earl Suffolk [aged 55] was created 1st Earl Suffolk. Katherine Wingfield Countess Suffolk [aged 45] by marriage Countess Suffolk.
Around 8th September 1397 Thomas of Woodstock 1st Duke of Gloucester [aged 42] was murdered in Calais [Map] for his role as leader of the Lords Appellant. Duke Albemarle, Duke Gloucester, Earl Essex forfeit. His son Humphrey [aged 16] succeeded 2nd Earl Buckingham.
Walter Clopton was part of the inquiry into his death the outcome of which is not known. A John Hall was executed for the murder.
Summary
29th September 1397. 1st. Edward 2nd Duke of York 1st Duke Albemarle [aged 24] created. See Richard II Rewards his Supporters.
25th October 1415. 1st. Edward 2nd Duke of York 1st Duke Albemarle extinct. See Battle of Agincourt.
On 29th September 1397 King Richard II [aged 30] rewarded his relations with Dukedoms, possibly for their part in downfall of Thomas of Woodstock 1st Duke of Gloucester [deceased], Thomas Beauchamp 12th Earl Warwick [aged 59] and Richard Fitzalan 9th Earl of Surrey 4th or 11th Earl of Arundel [deceased]...
His older half-brother John Holland 1st Duke Exeter [aged 45] was created 1st Duke Exeter. Elizabeth Lancaster Duchess Exeter [aged 34] by marriage Duchess Exeter.
His nephew Thomas Holland 1st Duke Surrey [aged 23] was created 1st Duke Surrey.
His first cousin once-removed Margaret was created 1st Duchess Norfolk - for life only. On the same day her grandson Thomas [aged 29] was also created Duke of Norfolk - see below.
His second cousin once removed Thomas Mowbray 1st Duke of Norfolk was created 1st Duke Norfolk. Elizabeth Fitzalan Duchess Norfolk [aged 31] by marriage Duchess Norfolk.
His first cousin Edward 2nd Duke of York 1st Duke Albemarle [aged 24] was created 1st Duke Albemarle. Beatrice Burgundy Countess Rutland and Cork [aged 24] by marriage Duchess Albemarle.
His illegitimate first cousin John Beaufort 1st Marquess Somerset and Dorset [aged 24] was created 1st Marquess Somerset, 1st Marquess Dorset. Margaret Holland Duchess Clarence [aged 12] by marriage Marchioness Somerset, Marchioness Dorset.
Ralph Neville 1st Earl of Westmoreland [aged 33] was created 1st Earl of Westmoreland. Joan Beaufort Countess of Westmoreland [aged 18] by marriage Countess of Westmoreland.
On 25th October 1415 King Henry V of England [aged 29] defeated a French army at the Battle of Agincourt.
The battle is described by three Chroniclers who were present:
Jean de Waurin: "1, the author of this work, know the truth of the matter, for in that assembly I was among the French".
Jean le Fevre de St Remy: "I who write this, seated on a horse among the baggage at the rear of the battle, along with the other priests who were present".
The anonymous author of the 
Deeds of King Henry V i.e. Deeds of Henry V: "while I was on the other side with the English".
Thomas Camoys 1st Baron Camoys [aged 64] commanded the Rearguard. Richard de Vere 11th Earl of Oxford [aged 30] commanded. Humphrey Lancaster 1st Duke Gloucester [aged 25] was wounded, and was protected by his brother King Henry V of England.
Edward 2nd Duke of York 1st Duke Albemarle [aged 42], commander of the Vanguard, was killed; the most senior English casualty. Duke Albemarle, Earl of Rutland and Earl Cork extinct. His nephew Richard [aged 4] succeeded 3rd Duke York and inherited his estates including Conisbrough Castle [Map].
John Fortescue [aged 35], Dafydd Gam Brecon [aged 35] and Edward Burnell [aged 44] and Roger Vaughan of Bredwardine [aged 38] were killed.
Michael de la Pole 3rd Earl Suffolk [aged 21] was killed. His brother William [aged 19] succeeded 4th Earl Suffolk, 4th Baron Pole.