U-boat stands for underwater boat. They were essentially the first submarine. No other countries had these which made them very dangerous. Also sonar wasn't very developed so they couldn't detect them. The U-boats also had torpedoes to sink enemy vessels. Also, enemy vessels didn't really have any weapons tocounter the U-boat. Hope this answers your question!
U-boats, packs of German U-boats searching for American ships were called wolf packs
They were German boats used in WWII.
something dangerous
Grays were a common color.
the lusitania
german U-boats were submarines. in German they are called Unterseeboot
no, boats made out of goat skin are dangerous
boats: Boote
U boats
german submarines
The numbers on German U-Boats represented the model numbers.
Yes they are.
No. German U-boats had ordinary, Arabic numerals, such U96 and so.
It's U-boats!!!!!
U-boats were German.
U boats were invented in 1914 for WW1
german U-boats were submarines. in German they are called Unterseeboot