Submarines came to the forefront of military navies with the advent of WWI, as Germany's dangerous U-boats proved a ...

When most people think of World War One ... and deadly involved unrestricted submarine warfare. The Germans argued that if a ship was carrying supplies to one of its enemies, be that weapons ...

The drive to explore is one of the most potent human ... to empty and fill ballast tanks, a submarine could now travel at length. When the First World War erupted in 1914, submarine services ...