The Treaty of Pipton was signed on 22 June 1265 during the Second Barons' War

Second Barons' War

The Second Barons' War was a civil war in England between the forces of a number of barons led by Simon de Montfort, against the Royalist forces led by Prince Edward , in the name of Henry III.-Causes:...

 and concluded an alliance between Simon de Montfort

Simon de Montfort, 6th Earl of Leicester

Simon de Montfort, 6th Earl of Leicester, 1st Earl of Chester , sometimes referred to as Simon V de Montfort to distinguish him from other Simon de Montforts, was an Anglo-Norman nobleman. He led the barons' rebellion against King Henry III of England during the Second Barons' War of 1263-4, and...

 and the Welsh

Welsh people

The Welsh people are an ethnic group and nation associated with Wales and the Welsh language.John Davies argues that the origin of the "Welsh nation" can be traced to the late 4th and early 5th centuries, following the Roman departure from Britain, although Brythonic Celtic languages seem to have...

 prince Llywelyn the Last

Llywelyn the Last

Llywelyn ap Gruffydd or Llywelyn Ein Llyw Olaf , sometimes rendered as Llywelyn II, was the last prince of an independent Wales before its conquest by Edward I of England....

.

The treaty, signed at Pipton

Pipton

Pipton is a small settlement and former civil parish in Powys, Wales on the Afon Llynfi near its confluence with the River Wye. It was formerly in the county of Brecknockshire and is now part of the Community of Bronllys...

, Powys

Powys

Powys is a local-government county and preserved county in Wales.-Geography:Powys covers the historic counties of Montgomeryshire and Radnorshire, most of Brecknockshire , and a small part of Denbighshire — an area of 5,179 km², making it the largest county in Wales by land area.It is...

, came after Simon de Montfort's defeat of English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 King Henry III

Henry III of England

Henry III was the son and successor of John as King of England, reigning for 56 years from 1216 until his death. His contemporaries knew him as Henry of Winchester. He was the first child king in England since the reign of Æthelred the Unready...

 at the Battle of Lewes

Battle of Lewes

The Battle of Lewes was one of two main battles of the conflict known as the Second Barons' War. It took place at Lewes in Sussex, on 14 May 1264...

 in 1264. The king and his son Prince Edward

Edward I of England

Edward I , also known as Edward Longshanks and the Hammer of the Scots, was King of England from 1272 to 1307. The first son of Henry III, Edward was involved early in the political intrigues of his father's reign, which included an outright rebellion by the English barons...

were captured. Llywelyn began negotiations with de Montfort, and in 1265 offered him the sum of 30,000 marks in exchange for a permanent peace, in which Llywelyn was acknowledged as the Prince of Wales. The treaty established an alliance between Llywelyn and de Montfort,an alliance cemented by the widower Prince agreeing to a betrothal between himself and de Montfort's only daughter Eleanor but the favourable terms primarily that the fealty of all the Princes, Lords and Chieftains of Wales be recognised as belonging to Llywelyn by right of sovereignty indicated de Montfort's desperate need for a counter to the power of the English Marcher Lords.