Anzac heritage is at risk as tunnel systems and trenches crumble but efforts to save them may bring other problems. Like so ...

British soldiers read a map in the trenches of the Western ... to break through the lines of the German trenches. One of many such failures. Trench warfare dragged on for years, with millions ...

After weeks of digging, the area around the small town of Medvedivka, near a crossing to mainland Ukraine, is webbed with an elaborate trench system stretching several miles. The passages are cut ...

(See how World War I energized mapmaking at National Geographic.) Photographed in 1917, an endless line of Russian soldiers sit patiently in a trench as ... network of trenches stretched from ...