Casualties during the operation were 10 U.S. Marines, two Navy corpsmen, and an Air Force crewman killed in the crash of Knife 31; an Air Force crewman killed in the crash of Knife 21; one Marine killed in action on the West Beach; and three Marines missing in action and presumed dead. Fifty were wounded including thirty-five Marines and six airmen. In addition a CH-53 crashed due to mechanical failure on the way to U-Tapao airfield, killing eighteen USAF Security Police and five flight crew.
Between 1991 and 1999, U.S. and Cambodian investigators conducted seven joint investigations, led by the Joint Task Force-Full Accounting. On three occasions Cambodian authorities unilaterally turned over remains believed to be those of American servicemen. In October and November 1995, U.S. and Cambodian specialists conducted an underwater recovery of the Knife 31 crash site where they located numerous remains, personal effects and aircraft debris associated with the loss. The USS Brunswick, a Navy salvage vessel, enabled the specialists to conduct their excavation offshore. In addition to the support provided by the Cambodian government, the Government of Vietnam also interviewed two Vietnamese informants in Ho Chi Minh City who turned over remains that were later positively identified. As a result of these investigations the remains of 2LT Richard Vandegeer, LCPL Gregory S Copenhaver, LCPL Andres Garcia, PFC Lynn Blessing, PFC Walter Boyd, PFC Antonio R Sandoval and PFC Kelton R. Turner were identified. In 2012 the remains of PFC James Jacques, PFC Richard W Rivenburgh and PFC James Maxwell were identified.