VETERANS, guests and families gathered for Vietnam Veterans Day on Thursday morning to honour the service and sacrifice of those who served during the ill-fated war.

On the 50th anniversary of the Battle of Long Tan, 150 attendees came together at the Vietnam Veterans Memorial Gardens at South Tweed Sports Club to remember the Australians and New Zealanders who fought in the fierce battle.

The battle claimed the lives of 17 Australians and wounded a further 25 (one of whom later died of his wounds) in Australia's costliest battle of the war.

As The Battle of Long Tan song's poignant words rung out, attendees were reminded of the sacrifices made during Australia's longest war.

Retired army colonel and Vietnam veteran Bob Sayce paid homage to those who served to ensure Australia's freedom and diplomacy.

"We are gathered here today to pay homage to the 121 servicemen and women who were killed in Vietnam, the 3000 wounded or injured, and to recognise the contributions made by some 60,000 servicemen and women,” Mr Sayce said.

"If a stand had not been made, it was doubtful that non-communist nations in the Asia Pacific area today would have the political freedom they now possess.”

Mr Sayce said the 105 Australians and three New Zealanders who fought in the Battle of Long Tan showed tremendous "determination, commitment and courage”, and implored leaders to carry on their legacy.

"The price of freedom is eternal vigilance, and we must continue to seek stability and peace in our region,” he said.

"Those of us who have fought in war always hope diplomacy and goodwill can find a resolution, however, experience has taught us that we must always be prepared to defend our sovereign rights. I hope our leaders now and in the future comprehend this and commit the resources necessary to ensure our freedom.”

The Last Post was sounded as the Australian flag was lowered to half mast before the St Josephs School choir sang the national anthem, reminding us to never forget the vets in attendance, at home, who've passed on or who lost their lives during the Vietnam War.

Lest we forget.