WASHINGTON, Feb. 2, 1917 (UP) - Official hint that some announcement of this government's course with regard to Germany's announced intention of waging unrestricted submarine warfare may be looked ...

By 1914 the submarine was not a new weapon, having first been used 150 years earlier. By the start of WW1 all the major powers possessed submarines, but their role was still undefined. Were they long ...

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 ...

Germany’s fateful decision to resume unrestricted submarine warfare on February 1, 1917, allowing U-boat commanders to sink unarmed neutral vessels without warning, sent shockwaves around the ...

Jan. 31 (UPI) --On this date in history: In 1917, Germany announces it will wage unrestricted submarine warfare against all ships, including passenger carriers, in war-zone waters. Advertisement ...