A commemoration event will be held in Hailsham on August 3 to mark the centenary of the start of World War One.
A parade and memorial service will be held, involving more than 100 people.
Organisations taking part will include the Royal British Legion, Royal Air Forces Association and Hailsham Town Council members, including the Town Mayor Cllr Jo Bentley.
The parade will gather at the Charles Hunt Centre car park at 10.25am.
The 1066 Pipes and Drums Marching Band is to lead the parade of ex-service and serving personnel, local cadet forces and emergency service personnel north along Vicarage Lane, then down the High Street to the Hailsham War Memorial for the service and wreath-laying ceremony to commence at 10.45am.
Cllr Bentley said: “I’m proud to be representing the people of Hailsham at this important service of appreciation organised by the Royal British Legion Hailsham Branch.
“The First World War was a turning point in world history, claiming the lives of over 16 million people worldwide and had an impact on the lives of everyone.
“One hundred years on, since, Britain declared war on Germany on 4th August 1914, we are all connected to the First World War in some way either through our own family history, the heritage of our local communities or because of its long term impact on the world we live in today.
“So for this reason we will be coming together to honour those who served, to remember those who died and to ensure that the lessons learnt live with us forever. That is our duty with this and other commemorations which pay tribute to our war heroes.
“Please support this ‘one off’ important event, wherever you live in Hailsham or surrounding areas. I hope that residents get involved and join us to mark this occasion.”
The Royal British Legion is involved in a number of commemorative Centenary projects at national, county and branch level. For further information, visit britishlegion.org.uk.