Former and current members of the Armed Forces, along with general public, donned poppies to remember the fallen.
More than 10,000 crosses and tributes from all other faiths are planted this year.
The Welsh National Field of Remembrance has opened with a ceremony led by First Minister Carwyn Jones and members of the Royal British Legion on November 8th at Cardiff Castle.
Shortly before 11am, the opening ceremony began with words of scripture from Cardiff council Honorary Chaplain, Reverend Canon Stewart Lisk.
A high ranking officer from the Army is planting crosses to remember those who gave the ultimate sacrifice.
The First Minister Carwyn Jones was there to give a speech and the Welsh Secretary Alun Cairns delivered the Welsh exhortation. Some high ranking officers from the Navy, Army and Air Force and the Cardiff City Mayor all had planted their poppies to those who died in service.
The Military Wives Choir performed at the end of the service.
A two-minute silence was observed at 11am, and then the Military Wives Choir performed. The service ended with the national anthem.
Many ex-service man and women along with their family came to remember those who died in the conflicts.
Among the many veterans who joined the ceremony, there was David Glyndwr, 80 years old, came to the remembrance ceremony every year, whose friend died during the Turkish Invasion of Cyprus.
David Hughes, who joined service in 1957, said, “Three relatives of mine died in the war in 1940s and 1980s, but we come here to plant crosses for all those who died in conflict regardless of the Nationality, races or color.” David is the chairman of the Western Front Association South Wales now.
A visitor is reading the messages on the crosses.
It was not just the veterans and those current members of the Armed Forces paying tributes to the fallen. Reginald Herbert Luths, whose grand father died in the First World War, the 28th of April 1917, came here to pay her respect to him. She said, “I think he and people like him died for our freedom, I am proud of him.”
“It’s so nice to remember those who died in a specific day,” said Kath David, who attended the ceremony. Her second cousin died in the second world war, in a low level flying in the Scotland, and her uncle was killed in the First World War.
The Fields of Remembrance are created by The Royal British Legion every November and Cardiff is one of the six across the UK.