The Nowra RSL Sub Branch will be celebrating its 100th anniversary on Wednesday, October 30 with a sit-down function.

The group's charter was issued in 1919 - following the First World War.

Current sub-branch president Fred Dawson said the 100th anniversary was a proud and significant moment for the group.

The sub-branch formed all those years ago to provide an important service.

"Its purpose was to look after the Diggers who were returning from the war-front not in a good condition," Mr Dawson said.

"They had been injured, gassed and had lost limbs.

"There was also the widows of those who did not come home and they also had to be looked after.

"Back then they had to be looked after because we did not have the department of veterans affairs or the pension systems that we have got now.

"In those early years, right through to the Second World War, pretty much all the sub-branch did was raise money look after the Diggers."

The group's home, at the Shoalhaven Ex-Servicemen's Club, is also surrounded by wall to wall history.

Mr Dawson says people can feel and sense the sub-branch's history when they walk into the group's meeting room and hall at the bottom end of Junction Street.

"We are just surrounded by it (history)," Mr Dawson says while pointing to one of the many honour boards.

"The honour boards record the office bearers going right back to the very beginning and there are some very well known Nowra names on the boards."

The sub-branch president said members of the public, particularly school students, are always welcome to visit the sub-branch rooms to soak up the history.

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Mr Dawson has been president for 10 years and would like to think 100 years from now that the sub-branch would be still relevant.

"The sub-branch will always be relevant because we are always fighting wars," he said.

"There is probably more Diggers out there now than we did after the second world war.

"They are out there in the community and a lot of them need help."

The group is marking the milestone with a function on Wednesday evening at their hall.

One of the group's oldest members will get the cut the birthday cake and a book on the group's first 50-years will be launched.

Respected Shoalhaven author Robyn Florance wrote the book and every sub-branch member will get a copy.

The Honorable Dr Geoff Lee, who is the acting Minister for Veterans' Affairs in NSW, will deliver the keynote speech.

Over 100 people are expected to attend the event.

In the 1980's the group was also known as the Nowra Greenwell Point RSL Sub-branch but in recent years reverted to its formation name.

Meanwhile, the sub-branch still remains committed to looking after the welfare needs of local returned servicemen.

Sub-branch volunteers continue to help sort out pension matters and general welfare issues.

Mr Dawson said looking after a veteran's welfare was the key reason why the sub-branch still exists today.

The sub-branch remains committed to helping its 240 members.

The sub-branch president added another one the group's important roles was organising commemorations like Anzac Day services.

Sub-branch members also go to nursing homes and schools to help run Anzac Day events.

The Nowra Sub-branch also gives money to local schools to buy books for their libraries.