Buckle is a small village in the Riverlands. It is disputed land between House Bracken and House Blackwood. It is currently held by House Blackwood.
Buckle was burned by the dragon Vhagar during the Dance of the Dragons.
A Dance with Dragons
Jonos Bracken wants Buckle for subduing Tytos Blackwood. Tytos surrenders Buckle as part of the price to submit to the Iron Throne.