CASUALTY RECORD // September 13, 1951
Battle of Heartbreak Ridge
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
2 sides catalogued · combined 28,700 estimated
United Nations
3,700
Medium-confidence figure
North Korea
25,000
Medium-confidence figure
Battle context
The Battle of Heartbreak Ridge ran from 13 September to 15 October 1951, lasting approximately one month and resulting in approximately 3,700 United Nations casualties against an estimated 25,000 North Korean casualties. The engagement followed directly from Bloody Ridge: after withdrawing from that position, Korean People's Army forces established new defensive lines on a 7-mile hill mass only 1,500 yards away, and those fortifications were assessed as even more formidable than those at Bloody Ridge. The battle illustrates the character of the Korean War's middle phase, in which tactical withdrawals did not yield ground so much as relocate prepared defenses to adjacent terrain, forcing attritional assaults to be repeated at each successive ridgeline with heavy cost to both sides.
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