Unrestricted Submarine Warfare (1 gen 1914 anni – 31 magg 1915 anni)
Descrizione:
Germany pursued a highly effective U-boat campaign against merchant ships. On 4 February 1915, Germany declared a war zone around Britain, within which merchant ships were sunk without warning.Aggiunto al nastro di tempo:
Data:
1 gen 1914 anni
31 magg 1915 anni
~ 1 years and 4 months