Question: What river's banks was the castle on where Andrew Dudley participated in the War of the Rough Wooing?
Related documents: [0]  [DOC] Broughty Castle is a historic castle on the banks of the river Tay in Broughty Ferry, Dundee, Scotland. It was completed around 1495, although the site was earlier fortified in 1454 when George Douglas, 4th Earl of Angus received permission to build on the site. His son Archibald Douglas, 5th Earl of Angus was coerced into ceding the castle to the crown. The main tower house forming the centre of the castle with four floors was built by Andrew, 2nd Lord Gray who was granted the castle in 1490. [END] 
[1]  [DOC] Sir Andrew Dudley, KG (c. 1507 – 1559) was an English soldier, courtier, and diplomat. A younger brother of John Dudley, 1st Duke of Northumberland, he served in Henry VIII's navy and obtained court offices under Edward VI. In 1547–1548 he acted as admiral of the fleet and participated in the War of the Rough Wooing in Scotland, where he commanded the English garrison of Broughty Castle. He was appointed captain of the fortress of Guînes in the Pale of Calais in late 1551. There he got involved in a dispute with the Lord Deputy of Calais, which ended only when both men were replaced in October 1552. [END] 
Answer: 
Tay
Tay