They laid down their lives on a foreign battlefield to protect the freedom of millions at home.
And children, veterans and relatives gathered across the district to remember those who died in the Battle of the Somme.
Paying their respects included 500 pupils from St Thomas a Becket school who held a service at Sandal Castle.
In Crigglestone, the parish council held a memorial service to honour the fallen, which included 12 Crigglestone soldiers who lost their lives during the battle.
Nearly 20,000 British soldiers lose their lives on that first day of the battle.
And the casualties injured, totalling 57,470, was the most the British Army has ever seen in a single day.
A century on, remembrance services took place across the district to commemorate the bravery of all those who fought during the First World War battle.