Today, 400 crosses would be placed during a ceremony at Laurie Hall Park to be attended by schools, sitting members of the armed forces, representatives from police and the NZ Fire Service, and war veterans.
Another 100 crosses would be added during the next 30 days.
Whangarei Mayor Sheryl Mai and the head boy of Kamo High School, Joseph Faithful, will be chief guests at today's ceremony.
Mr Dixon said Faithful would give the same speech he delivered at the regional finals of RNZ/RSA-ANZ national speech competition on New Zealanders at War.
The Whangarei Youth Music Concert Band will play, with lyrics to be sung by a broad spectrum of age groups, from youths to senior citizens.
Mr Dixon said over the next 30 days, people would have an opportunity to personalise the crosses in memory of their loved ones killed in action or died of wounds during the war.
The placement of crosses in Whangarei began in 2010.
Rehearsal for cross placements will start at 9.30am. This year marks a century since the beginning of World War I.