The final attack of the Korean War on the Sui-ho hydroelectric complex was made on June 7, 1953. A force of eight F-86F fighter-bombers from the 8th FBG, in "integral flight formation" with twelve of the 51st FIG to disguise its mission, flew as part of the Yalu River patrol, escorted by 66 other F-86s. The fighter-bomber formation reached the Sui-ho Reservoir, a common F-86 checkpoint, then rolled into its bomb run, surprising the defenders. Although several hits were reported, tailrace activity several days later indicated two generators were probably operating, and further attacks were discontinued for lack of intelligence of their location within the vast powerhouse.