The convoy of soldiers involved in the Defence Force's greatest day of loss since the Vietnam War was providing an escort for one of them to go to the doctor with an eye complaint.
The 12 soldiers in Kiwi Team Four set off on Sunday morning from Do Abe base, along the road they have named after the Hurricanes rugby team towards Romero base 25km away.
Each of the four Humvees held three soldiers, which is a common way to travel whether on patrol or taking someone to the nearest doctor.
A short time later a bomb under the last vehicle in the convoy was detonated.
The blast of an estimated 20kg left a large crater and killed three soldiers instantly: Corporal Luke Tamatea, 31, Lance Corporal Jacinda Baker, 26, and Private Richard Harris, 21.