In September 1914, a single German U-boat ventured into the North Sea. Lieutenant Otto Weddigen’s U-9 slipped past patrols ...

The introduction of the submarine to naval warfare reshaped planning and doctrine. While typical engagements relied on guns and precision, the submarine didn’t need to concern itself with being as ...

Submarines appeared on the global stage during World War I, when Germany unleashed a campaign of unrestricted submarine warfare in 1917 to sever supply lines between Great Britain and its allies. In ...

The S-class submarine’s legacy endures as a testament to undersea warfare’s evolution, and the brilliance of early 20th century British submarine designs. The British S-class submarine was one of the ...