Around 5000 tributes have been planted at Cardiff Castle to make up Wales' National Field of Remembrance.
Tributes planted can take the form of a Remembrance Cross, Muslim Crescent, Star of David, Sikh Khanda, Hindu Om or Secular Tribute.
The number is expected to rise as the field remains open to the public until Monday 25 November.
The castle is among six other Royal British Legion Fields of Remembrance across the UK, including fields in Gateshead, Westminster and the National Memorial Arboretum.
The first Welsh Field of Remembrance was opened in 2000 in Cathays Park next to the National Memorial and moved to Cardiff Castle in 2010.
Andy Davies joined the Royal Air Force in 1969 when he was 16-years-old. He said it was a "privilege" to be asked to plant a tribute.
Jeannette Hares, from Caldicot, attended the service to remember her grandfather who was killed during WWI.
The Royal British Legion has been planting Fields of Remembrance for over 85 years.
The field is also commemorating the 75th anniversary of the D-Day landings.
The poppies used to garnish the D-Day 75 stand represent the men and women who died on the beaches on Tuesday 6 June 1944.