Which of the following was a primitive but effective submarine invented by the Germans and used extensively in the First World War?
A)The Acheron
B)The U-boat
C)The Grayback
D)The R-21
E)The Mackerel

Question

Quizplus · Accepted Answer

The U-boat was the term used for German submarines in World War I (and also in World War II). These were a key part of Germany's naval strategy and were used extensively for blockades and attacks on enemy shipping.

Which of the Following Was a Primitive but Effective Submarine