Wales was initially reluctant about signing up to the First World War. However, by the end of the war 273,000 Welshmen had fought.
Veterans returning home from the Great War to northern and southern Ireland received wildly contrasting welcomes.
As Britain marks 100 years since the First World War, the country will join in a series of commemorative events over the next four years.
Visitors to the Imperial War Museum will be able to experience what life was really like on the frontline during WW1 after recreating a trench.
ITV News reporter Martha Farlie has this report:
More than 1,000 artifacts including an old gramophone which was played in the trenches during the Battle of the Somme are also on display.