For generations, the Murdaugh family dominated their rural swath of South Carolina - then Alex Murdaugh was accused of the brutal murders of his wife and son.
(BBC)

swath 大部分の地域　(G6)

ジーニアスはよくこの訳語を掲載しましたね
過去の編者が自前の用例から拾ったのではとも思えます