acceleration Of R&D on submarines (28 Jan 1917 Jahr – 19 Mai 1919 Jahr)
Beschreibung:
The first world war had broke out and because of it new research and development was forced to take place in order to detect enemy submarines. This was the first time that submarines were used as practical weapons and when new measures were needed to be taken in order to combat them.Zugefügt zum Band der Zeit:
Datum:
28 Jan 1917 Jahr
19 Mai 1919 Jahr
~ 2 years and 3 months
