More than 3500 New Zealand Defence Force staff were deployed in Afghanistan within that time.
Ten were killed while on service - two died during the Battle of Baghak in the Bamyan Province in August, 2012, and another six were wounded, including Craig Wilson, who was a senior officer.
Wilson, the recipient of a New Zealand Gallantry decoration, told Morning Report while it's sad to see what's happening in Afghanistan, he's not surprised.
"It's been coming for a long time and even we could see it when we were over there.
"There were so many parts of the government and administration system that weren't functioning and we got to see that out in the remote rural areas where we were stationed.
"If you can't make things better for the people then they're going to look for an alternative and it appears that's what's happened."
He said he's proud of New Zealand's contribution to the war in Afghanistan.
"I think we did a lot of good because there's a couple of things that the Taliban can never take away and that is you teach people to read, they can then access the internet, they can think for themselves."
He said the number of Afghans who could read between his first tour in 2002 and his last in 2012 had risen significantly.
"Now you've had a whole generation of people who have had at least access to some basic education and the resources to better their lives."
Education is something the Taliban cannot take away from people, he said.
