This year marks the 100th anniversary of the beginning of World War One. The “Great War” claimed the lives of some 9 million combatants and touched the lives of countless millions more. Its effects are still seen and felt today, despite the fact that those who actually fought are no longer present at memorial services around the world, the last few veterans having passed away only very recently.

The conflict engulfed every major power of the age and the horrors of the four-year hostilities still resonate in a world that has seen very little peace in the past century.

The BBC is marking this anniversary with an astonishing series of programmes, and at you will find the accompanying online resources.

The tales of heroism and horror are incredibly compelling, and this is a series not to be missed by anybody interested in the events that shaped our world.