The confirmation comes almost two months after North Korea agreed to return 55 boxes of remains to the United States following a meeting between President Donald Trump and communist dictator Kim Jong-un in Singapore.
"It's a huge battle", said Jin, who estimated that 1,700 of the missing US forces from the war came from that fight alone.
Fifty-five boxes of human remains from the 1950-53 Korean War were handed over by North Korea in late July, that has been seen as a sign of progress after the historic Singapore meeting between US President Donald Trump and the North Korean top leader Kim Jong-un.
Mattis praised the work of those involved in the identification process and said it represents long-awaited closure form some families.
The forensic teams have reportedly analyzed 23 of the 55 sets of remains, though some are more complete than others.
Richard Downes, whose father, Air Force Lt. Hal Downes, is among the Korean War missing, said this turnover of remains, having drawn worldwide attention, has the potential to put the USA back on track to finding and eventually identifying many more. One set was identified as a tall black American. Of those, around 5,300 American casualties are still believed to be in North Korea. Despite setbacks in the nuclear negotiations, North Korea has maintained its moratorium on weapons testing, has toned down its rhetoric, and attempted to downplay the threatening nature of its arsenal, as was evidenced by its decision not to feature ICBMs in its most recent military parade.
Forensic anthropologists have been examining the remains at a facility on Joint Base Pearl Harbor-Hickam, Reuters reported.
The condition of some of the remains is decidedly better than that of others.
She spoke above tables of bone fragments, still separated with numbers corresponding with 55 boxes used by North Korea to deliver them to the United States.
"It's really personal to me", Jin said.
The US-led United Nations delegation was led by US Air Force Maj.