In last week’s Memorial Day editorial, we attempted to pay tribute to America’s war dead by pointing out the many military anniversaries associated with the year 2015. Unfortunately, we missed one anniversary that is near and dear to the hearts of veterans of, ironically enough, “America’s forgotten war”—the Korean War.

One of those veterans contacted us after last week’s editorial came out to chide us about the omission. We hope to make amends now.

Sixty-five years ago, on June 25, the Korean War began when some 75,000 soldiers from the North Korean People’s Army poured across the 38th parallel. By July, American troops had entered the war on South Korea’s behalf. Three years later, the war came to an end, but not after the loss of some 36,574 American dead, as well as 103,284 wounded in action, according to figures from the U.S. Department of Defense.

All of those who have put themselves in harm’s way for our nation, and ...