A wreath will be laid at the war memorial in Barker’s Pool, Sheffield city centre, by the city’s lesbian, gay, bisexual and transgender community.
It will be laid during the Remembrance Sunday service by Kathryn Housley, LGBT Sheffield chairman, and Coun Neale Gibson, secretary.
An LGBT Sheffield spokesman said: “The contribution an invisible army of LGBT people have made in time of war is often ignored. It includes Alan Turing, who helped crack the German Enigma codes, and Roberta Cowell, the former Spitfire pilot who became the first British woman to undergo gender reassignment surgery.
“LGBT Sheffield believes the feats of LGBT people have been forgotten for too long.”
The service starts at 10.40am.