As well as song, prayer and the laying of wreaths, the morning event included stories of US soldiers who had found temporary homes in Paekakariki when they unexpectedly landed in 1942, to assist with New Zealand's threat of invasion.
"Today we remember with the greatest gratitude and love our servicemen and women, who protected and defended our country in the Pacific war," Ms Rowan said.
"Our story ends abruptly and was often tragic, but is tempered with the birth of lifelong friendships between the United States and New Zealand, and between generations of families and friends."
At the time, when the Paekakariki population was just several hundred, many thousands of marines camped on land in Kapiti; some of who were adopted by local families and invited to share meals.
"For many, these marines became like family."
Sadly, the war in the Pacific saw many thousands of soldiers die, including 10 US sailors who drowned during a tragic beach landing, by the park, in 1943.
As part of Monday's ceremony, a restored marine hut was shared with guests, now located at Queen Elizabeth Park, where US soldiers once camped in similar accommodation.
Three-quarters of a century later, the hut is the refurbished handiwork of Kapiti and Waikanae MenzShed members, and is a reminder of a period strong in Kapiti's history.
