The Red Cross invited community members and special guest Warrant Officer Nadia McCulloch to lunch at the USMC for the event.

Narromine local, Warrant Officer McCulloch, spoke about her time in the army which was well received by a delighted audience.

She discussed time on duty and how she was relieved the Red Cross was there.

"I'm honoured to be here talking to the Red Cross," she said.

"Knowing the Red Cross was there (on duty) was a relief."

Warrant Officer McCulloch was called up to help during the Queensland flood.

"It was a privilege knowing the Red Cross was there to help us."

Red Cross president Jenny Berryman thanked Nadia for her time.

"You're a wonderful person and a wonderful ambassador for the army," she said.

Red Cross branches around the country are celebrating their centenary this year, in particular this month.

The Red Cross officially turned 100 on Wednesday.

"Red Cross was born just days after WWI broke out, and hundreds of thousands of volunteers signed up to raise funds, produce goods to send overseas and to care for the wounded. By WWII we had become Australia's largest charitable organisation," Red Cross CEO Robert Tickner said.

"Our legacy has been built by millions of people caring for others in times of need. The commitment of so many people over a century to act with compassion, to help vulnerable people through times of national and personal crisis, during wars and disasters, has earned Red Cross its trusted reputation."