NSW Governor David Hurley and his wife, Linda, escorted the couple around the building.
And while these young women might have a sense of confidence because of their schooling, that is not all they have developed, as it seems they are trying to change the world in their own way as well.
On the floor was a large stone circle, lined with 100 phials of soil from battlefields across the world, showing all the places the state's personnel have served.
The memorial was never fully completed in line with its original architectural plans when it was opened in 1934, because of the financial hardships of the Great Depression.
The completion of the extension, which cost £22 million, coincides with the 100th anniversary of the cessation of hostilities in the war.
The fog didn't stop the crowds from coming down to greet the Duke and Duchess of Sussex at Bondi Beach.
The Duke and Duchess of Sussex arrived at Hyde Park about 10am on Saturday with NSW Governor David Hurley, a former chief of the defence force, and were welcomed by an Australian Army marching band.
"You hear people that met the Queen when she came here (in 1954)" said 26-year-old fan Christopher Cundle, "and they are still talking about it now".
Charlotte Connell, a OneWave member, said Harry spoke of his own experiences seeking counselling more than 20 years after his mother, Princess Diana, died in a auto crash in a Paris tunnel in 1997 when he was aged 12. He looks after his soldiers.
"I'm really humbled and proud".
When will Harry and Meghan's baby be born?
"Men can help as well by getting involved, we have to", he said.
Later, the couple will meet Prime Minister Scott Morrison and leader of the opposition Bill Shorten.
The duchess wore a black, high-necked, full-skirted dress with buttons down the front and a matching hat.
Harry and Meghan then took in the first event of the Invictus Games - the Jaguar Land Rover Driving Challenge at the city's Cockatoo Island.