Michelle Welsh

I've been told all my life that Grandad served in the 28th Maori Battallion. His name is Raymond David Welsh and his number is 450325. He passed away when I was 5 and I am wanting to find out more about him and his service. If anyone can help me find more information I would really appreciate it. Unfortunatly my Dad was the youngest and doens't know much about him. My Uncle & Aunty have passed away.