or U-boats, sunk, scuttled, captured, or otherwise lost to German forces during World War II. Here, naval historian Timothy Mulligan describes 25 of the most historically significant U-boats.

Were the Unterseeboots Ready for War? U-boats were the submarine arm of the German navy and a month into WW1 they struck at the Royal Navy when U-21 sank the cruiser HMS Pathfinder. This was the ...

The weapon would be the submarine, U-boats. On a desolate mud bank in the salt marshes of Kent lies the metal carcass of a First World War German U-boat. British ships were blockading German ports ...