The marines practised for just over a fortnight, landing both men and machines, including tanks and heavy artillery, on to the sandy shores of Mahia Beach.
The troops set up camp in a pine forest on the coast.
One local who also found the arrival of the marines memorable was a keen photographer by the name of James Osler, who had arrived in Wairoa in 1908 and established the well-known Oslers Bakery shortly afterwards.
Fascinated by the American troops and their activities, he began taking photographs but within minutes was arrested by US Military Police who confiscated his camera.
They did not want to risk any of the photos of their assault methods becoming public.
This weekend's military invasion included displays of old military vehicles as well as classic American cars and motorcycles. The New Zealand Military Vehicle Collectors Club organised the event.
Yesterday there was also a memorial ceremony at the Mahia Domain, followed by an unveiling of a plaque by Mr Huebner.