U-boat warfare (1914-1918) (7 дек 1909 г. – 15 фев 1919 г.)
Описание:
were on a mission to destroy merchant vessels carrying supplies to allied forces in order to hinder their war efforts. Aided by intelligence reports on the location, destination, and speed of merchant vessels, the U-boats would search the seas for victimsДобавлено на ленту времени:
Дата:
7 дек 1909 г.
15 фев 1919 г.
~ 9 years and 2 months