The Germans made them to stop the British from getting merchant ships and naval transport which caused Britain to have a lack of supplies and it was harder for her to get boats to her empire.
The Uboat was a submarine made by the Germans
UBoat
Primarily over 2,000 merchant vessels, with a sprinkling of allied warships.
German Uboat torpedos sinking half of the Merchant Marine fleet
yes
It was built for World War 2
I Think Subs Had The Biggest Effective By Sinking The Lusitania One Of The Things That Brought The US Into WWI (There Were Also Many Other Cases Of Germany Using Unrestricted Sub Warfare )
During World War II, U-boats were operated by the German Navy, known as the Kriegsmarine. They were used to disrupt Allied supply lines and conduct military operations at sea.
Shelters were built in World War 2 as protection against bombs and chemical scares
Which war memorial? There are thousands of them around the world.
It wasn't built during a war, it was after World War II.
No, it was built way before that.