In December 1918, the HMS Cassandra was headed towards Tallinn to support Estonian efforts to break away from Bolshevik rule at the end of World War I. She hit a mine and sank off the island of ...

World War I (1914 to 1918) and World War II (1939 to 1945) saw some of the biggest naval battles and operations in history, and shipwrecks from this era are scattered across the world's oceans — ...

After 80 years at the bottom of a remote Pacific lagoon, a sunken Japanese warship has begun to spill its toxic cargo into ...

The wreckage of a major German warship has been discovered off the coast of Norway some 80 years after it was sunk in a World War Two battle, Norwegian power grid operator Statnett and a maritime ...

National Geographic Explorer-at-Large Bob Ballard revisits the Iron Bottom Sound—rediscovering vessels, and making new finds.