Here's and article I wrote for the WarZone covering my recent visit of the German Navy's 1st Submarine Squadron at Eckernfoerde. Hope you enjoy. : r/ submarines

Album] Some photos from my tour of the German Navy's Type 212A Batch I-class U-32 (S-182) today at the 1st Submarine Squadron Base at Eckernfoerde, Germany. : r/submarines

The commander of the german submarine hi-res stock photography and images - Alamy

Newsela The deadly U-boat of the German navy in World War I

Germany resumes unrestricted submarine warfare, February 1, 1917

ADMIRALS' WAR – The Entire Campaign - September 1939 to January 1945

Album] Some photos from my tour of the German Navy's Type 212A Batch I-class U-32 (S-182) today at the 1st Submarine Squadron Base at Eckernfoerde, Germany. : r/submarines

29 German Military Inaugurates New Submarines Stock Photos, High-Res Pictures, and Images - Getty Images

The Project Gutenberg eBook of “1683-1920”, by Frederick F. Schrader.

Royal Navy promoted sailor despite joining neo-Nazi group, Far right

A Silent Guardian Still on Patrol - New Hampshire Magazine