Dick Smith, of Featherston, who is involved in the collation of information for the history of D Company, told the Dannevirke News there were no surviving members of D Company and only four or five other Māori Battalion veterans alive in New Zealand.
Helping to raise money for the publication of the history of D Company, brothers John and Frank Edwards were busy on the barbecue.
"Our uncle Wi Edwards was killed in action in Italy, but his brother Steve came home," John said. "Our dad was in the home guard, because apparently he had too many children dependent on him to be sent to war."
Frank said the research being undertaken should give the younger generation an insight into their experiences.
Researchers want to find out what the soldiers were doing before they left for the battlefields, their age when they left and what they did when they came back home.
"So many of them left here very young, just 15 or 16," Driver said.
Immediate past president of Nga Uri O Te Rua Tekau Ma Waru (descendants of the 28th Māori Battalion), Smith said he was excited the history of D company will be remembered in a book – something that had been accomplished before for C company.
The 28th Māori Battalion was made up of four rifle companies – A, B, C and D, the largest of which covers three quarters of the country.
Smith said one of the biggest challenges in compiling the book was the missing input of D company veterans from the Pacific Islands in the two-year project, which is now at the 12-month stage.