Germany changed the tactic during WWI via unrestricted submarine warfare, which meant that German U-boats could attack without warning any vessel it came across. Germany sank the civilian vessel ...

Germany soon announced it would engage in unrestricted submarine warfare. Namely, German U-boats could sink virtually any vessel without warning. This policy would ultimately spell disaster for ...

index. $37.50. ISBN: 1603440836. This ground-breaking work builds a convincing case that demolishes the commonly accepted view of that the U.S. Navy resorted to unrestricted submarine warfare in the ...

Germany's unrestricted submarine warfare, however, was an intolerable affront to America's dignity and honor. At the start of 1917, British intelligence intercepted the Zimmerman telegram ...

These ships are believed to have sunk due to attacks by German submarines during World War I, specifically during the unrestricted submarine warfare launched by Germany. This aggressive naval ...

A real threat to Britain's food supplies and Britain’s ability to continue the war effort came in 1916 when a new campaign of 'unrestricted submarine warfare' began with deadly effect ...