The Governor-General of Australia David Hurley, along with more than 8000 others, flocked to Greta to celebrate the 70th and 80th anniversaries of a former military and migrant camp.
Co-organiser, Central Hunter Business Chamber president Brett Wild, said the weekend's events, including performances, re-enactments, and aerial displays, had gone "amazingly".
"The service personnel who trained here fought for the freedoms of others," Mr Wild said. "Without the military aspect there would not have been the migrant camp. It's important to acknowledge how one flowed to the other."
Hunter Multicultural Communities chief executive officer Annette Gebhardt said many attendees came to "reconnect with their roots" to migrants who fled Europe after World War II.
Saturday's commemorations began with a military parade led by the Royal Australian Navy Band, Defence personnel and veterans.