"She broke down in tears," he said.
"We had a few widows there who had their late husbands' names of the plaque. There were a few little tears there."
The unveiling was the culmination of a lot of research and work. Mr Nielsen said it meant a lot to the Korean veterans.
"It was a wonderful effort by everybody," he said.
A rock was placed at the site behind the cenotaph last Tuesday before the plaque was set into it.
Veterans from throughout the North Island, as well as widows of the men who had died, and members of the Wanganui Korean Society attended. Counsellor Hongkon Kim from the Korean Embassy also spoke at the ceremony.