A stone will be laid in Lewes to remember Victoria Cross recipient Sidney Woodroffe on July 30.
Money for the stone came from the Government and is part of a national scheme to commemorate people who were given the medal.
The Victoria Cross is the highest military decoration awarded for valour “in the face of the enemy” to members of the armed forces in the UK.
Lewes Town Council, Lewes District Council and East Sussex County Council are working together to find a site to lay the stone.
It will be unveiled at a special ceremony on July 30.
Sidney, from Lewes, died fighting in World War I in Belgium, aged just 19.
Lewes resident Graham Mayhew, who asked the town council to commemorate Sidney, said: “He was exceptionally brave and his loss, like that of so many young men on both sides of the conflict, typified the mass slaughter of trench warfare.”