(1915)
On 3 November 1914, Great Britain began mining the North Sea as part of a blockade of Germany, during World War I, ultimately including foodstuffs. German proclaimed a “war zone” around the British Isles (4 February 1915), advising merchant shipping that it must anticipate attack without warning. Berlin cited the submarine's vulnerability to justify abandoning rules of cruiser warfare, which called for warnings and then visit‐and‐search of merchant ships suspected of transporting contraband. If contraband were discovered, the belligerent must ensure the crew's safety before seizing or destroying the vessel. Britain deemed the war zone an illegal blockade, armed its merchant ships, and ordered them to attack surfaced submarines. The United States, not yet in the war, announced it would hold Germany to “strict accountability” for loss of American lives and property.
On 7 May 1915, the German submarine U‐20 sank the unprotected British liner Lusitania without warning in its approach to the Irish Sea. The giant Cunard Vessel sank in twenty minutes. Of 1,959 passengers and crew, 1,128 perished—128 of them Americans. Although the Lusitania was carrying 4,200 cases of contraband ammunition, the reasons why it sank so quickly are still debated.
Attack without warning defied American support of neutral/noncombatant rights. On 13 May, President Woodrow Wilson asked Germany to disavow its action but avoided a diplomatic break, having noted that a people could be “too proud to fight.” When Germany delayed, Wilson moved to preserve national honor, rights, and prestige, insisting on visit‐and‐search, indemnity, and no further attacks on liners. Secretary of State William Jennings Bryan resigned in protest. Eventually, Germany suspended unrestricted attacks, and in February 1916 it apologized and offered indemnity without acknowledging illegality. But the incident strengthened America's perception of Germany as a ruthless and law‐less nation.
[See also Blockades.]
Bibliography
- Thomas M. Bailey and
- Paul B. Ryan, The Lusitania Disaster: An Episode in Modern Warfare and Diplomacy, 1975




