Castleford branch of the Royal British Legion is in danger of closing down if new members do not come forward.
Katie Bird, honorary branch secretary, said numbers had dwindled from more than 80 to fewer than 50 in recent years.
She thinks the branch, on Powell Street, will be forced to shut - and could end up being knocked down - if younger residents do not get involved.
Miss Bird, 24, is urging people to come along to the group’s next meeting to show their support.
She said: “It may not happen in my lifetime and I certainly hope it doesn’t. But every year it comes round to renewing our memberships and the numbers are lacking. The reality is that if the legion doesn’t have enough members, it will be shut down.
“If they close the Castleford British Legion, many members of the public will struggle without our help and many veterans would struggle and find it difficult to cope.
“It also means the town will be left without a remembrance service.
“Members of the army cadet force, air training corps and the sea cadet corps will be moved all over the area to take part in a Remembrance Day parade.
“Members of the armed forces who are coming out of the service now would not have our help and support. The problem with the Legion is that people forget about us until it is time for the Poppy Appeal - we are in the background for the rest of the year.
“It is 100 years since the start of the First World War and I think that is a timely reminder of how much we need to show support for our armed forces.
“We fought for more than 10 years to have a memorial in Castleford. If the Legion shuts, the memorial will be relocated and it will all have been for nothing. We need younger generations to step forward soon.”
Anyone who would like to join the legion should go along to its next meeting on Sunday, June 1.
The meeting takes place at 11.30am at Powell Street club..