Question: Where is the castle that John Crabbe defended in 1318 against the English?

Context paragraphs:
Berwick Castle: Berwick Castle is a ruined castle in Berwick-upon-Tweed, Northumberland, England.

John Crabbe (died 1352): John Crabbe (before 1305 – 1352) was a Flemish merchant, pirate and soldier.  He defended Berwick Castle for the Scots against English forces in 1318, but after being captured by the English in 1332 assisted the English when they again besieged at Berwick in 1333, and became a loyal servant of Edward III, for whom he also fought at the Battle of Sluys.

Southsea Castle: Southsea Castle, historically also known as Chaderton Castle, South Castle and Portsea Castle, is an artillery fort originally constructed by Henry VIII on Portsea Island, Hampshire, in 1544.  It formed part of the King's Device programme to protect against invasion from France and the Holy Roman Empire, and defended the Solent and the eastern approach to Portsmouth.  The castle had a square central keep, two rectangular gun platforms to the east and west, and two angled bastions to the front and rear, and was an early English example of the "trace italienne"-style of fortification popular on the Continent.  The Cowdray engraving of the Battle of the Solent in 1545 depicted Henry VIII visiting the castle.  Despite several serious fires, it remained in service and saw brief action at the start of the English Civil War in 1642 when it was stormed by Parliamentary forces.

John Crabbe Cunningham: John Crabbe Cunningham (1927 – 31 January 1980) was a Scottish climber.  Born in Glasgow, he climbed extensively in the Scottish mountains, where he pioneered new techniques of ice climbing.

Mount Jackson (Antarctica): Mount Jackson (Mount Andrew Jackson and Mount Ernest Gruening) is a mountain that dominates the upland of the southern part of the Antarctic Peninsula.  It is located in Palmer Land, within the Antarctic claims of Argentina, Chile and the United Kingdom.  With an elevation of 3184 m , Mount Jackson is the highest mountain in the Antarctic Peninsula and the British Antarctic Territory.  Discovered by members of the United States Antarctic Service, 1939–41, it was named for Andrew Jackson, the seventh President of the United States.  The first ascent of Mount Jackson was made by a team led by John Crabbe Cunningham of the British Antarctic Survey (BAS) in 1964.  Mount Jackson's geology was studied in 1972 as part of the Palmer Island investigations by a team of geologists.

John Crabbe: Stephen Allan John Crabbe (born 20 October 1954) is an English former professional footballer.  He played for six Football League clubs, with his most successful spell coming at Gillingham.

Mount Cunningham: Mount Cunningham is a mountain at the west end of South Georgia's Esmark Glacier.  It is situated between Jossac Bight and Queen Maud Bay.  With an elevation of 1218 m , it is the 16th highest mountain in South Georgia.  The mountain was named after Scottish mountaineer John Crabbe Cunningham as a memorial after his death on 31 January 1980, following a climbing accident when struck by waves off Holyhead.

Enclosure castle: An enclosure castle is a defended residence or stronghold, built mainly of stone, in which the principal or sole defence comprises the walls and towers, within the walls one can find the buildings associated with a mediaeval military settlement: a warden's house, barracks, kitchens, stables, a chapel, and a keep.  Examples include Kenilworth Castle, Clitheroe Castle and Ludlow Castle.  Many in England are under the protection of English Heritage, which has counted 126 examples.  There are several in Ireland also, for example King John's Castle, Carlingford.

John de Brantingham: John de Brantingham was an English Christian clergyman of the early fourteenth century and a member of the Brantingham family.  He held a prebend of Derby Cathedral, value 5 marks a year, and the rectory of Askeby, worth 20 marks annually.  In June 1318, Pope John XXII empowered de Brantingham to hold, in addition to his existing posts, the rectory of Huggate in the diocese of York, worth 40 pounds per annum.  Later, de Brantingham also served as vicar of Otley in Yorkshire.

Capture of Berwick (1318): The Capture of Berwick was an event in the First War of Scottish Independence which took place in April 1318.  Sir James Douglas, Lord of Douglas took the town and castle of Berwick-upon-Tweed from the English, who had controlled the town since 1296.

Supporting paragraphs: John Crabbe (died 1352) Berwick Castle
Answer: Berwick-upon-Tweed, Northumberland, England