At its peak, around 850 Army, Navy and Air Force personnel were assigned to the operation, supporting recovery efforts in and around Taree, Port Macquarie, Grafton, Coffs Harbour, Nambucca, Kempsey and the Hawkesbury Nepean.

Thousands of residents and business owners were assisted during the clean-up, particularly on the Mid North Coast.

Commander of the ADF Joint Task Group for NSW Brigadier Mick Garraway said the ADF always stands ready to help Australians in need.

"It has been an enormous privilege to be able to help out in some small way whether it's removing debris, clearing roads to provide access, or clearing other flood and storm damage to support access to critical infrastructure or essential services," Brigadier Garraway said.

"We've worked closely with Resilience NSW and other state agencies to ensure that our resources have been directed to areas most in need.

"Our mission was to set the conditions for deeper state-led recovery efforts."

As the remaining relief tasks on the ground are completed, Brigadier Garraway expressed his appreciation for the way personnel were welcomed into the communities.

"I want to thank these communities for the friendship and support they've shown our members, particularly given the hardship and losses many of them have faced," he said.

Defence personnel assisted State-led aerial evacuation operations, removed 900 tonnes of waste from homes, properties and businesses, checked, cleared and reopened 170 kilometres of roads, returned several jetties and piers to workable conditions, transported hundreds of litres of water and thousands of litres of fuel and delivered 650 kilograms of fodder to local farmers.