What is the purpose of the angled bracket on the front top of submarines you see from World War I and World War II? - Quora

Rocky Mountains Terra Encounters

What was the best landing ship during World War II? - Quora

Old submarines (WW2 and earlier) looked more or less like normal ships. When and why did submarines first adopt the modern orca-like look? : r/AskHistorians

What is the purpose of the angled bracket on the front top of submarines you see from World War I and World War II? - Quora

Armament of the Iowa-class battleship - Wikipedia

In WWII, were there any notable differences between the German and Japanese submarine corps, regarding equipment, tactics, mission, or organization? - Quora

Essex-class aircraft carrier - Wikipedia

Why did submarines in World War 2 have two periscopes? - Quora

How effective would a submersible battleship be in WW2? - Quora

Defence of the Reich - Wikipedia

Did any German submarines get converted into aircraft carriers after World War II ended? - Quora

Totally & utterly fascinating images of the US capturing U-Boat

U-Boat Images - LaunchBox Games Database

Awards and documents of U-Boat Commander Olt.z.S. Heinrich

The Caribbean War Front in World War II: The Untold Story of U-Boats, Spies, and Economic Warfare — Markus Wiener Publishers

RARE Kriegsmarine KM Navy U-Boat Clasp award in bronze by Schwerin in Bronze