Balabac Strait
"Willoughby" weighed anchor on 7 June 1945 and headed for Brunei Bay, rendezvousing in Balabac Strait on 8 June 1945 with the Brunei assault force, and continued in company with those warships for the remainder of the voyage toward her objective. Meanwhile, on 9 June 1945, four of her PT boats -- USS "PT-78", USS "PT-81", USS "PT-82", and USS "PT-84"—patrolled the invasion area.