During the Battle of the Somme in 1916, British troops dug a tunnel about 300 meters long beneath German trenches and packed it with around 27 tons of explosives. On July 1st, 1916, at 7:28 a.m., the mine was detonated — creating a massive crater about 300 feet wide, becoming a powerful symbol of underground warfare in World War I. #WorldWarI #BattleOfTheSomme #MilitaryHistory | Slice of History

Discover facts about the Battle of the Somme and see how the site has changed since 1916 with footage from The Battle of the Somme film overlaid with shots of the same locations 100 years on in a poignant reminder of the impact of war. | Imperial War Museum London