(See how World War I energized mapmaking at National Geographic.) Photographed in 1917, an endless line of Russian soldiers sit patiently in a trench ... we explore one such site, located along ...

They found the spade in a ring gully, a type of circular trench ... site, where organic remains like wood would disappear, they can become preserved for thousands of years, as this one demonstrates.

Typical army food rations included cans of preserved meat, vegetables, bread. and hard biscuits. A British Pioneer Regiment digging defensive trenches at the Western Front, World War One.

When we look back at World War One, the trenches are among the first things ... Dan Snow:You can of course visit the sites and get a sense of the experience today, which is what military historian ...