31 January
31 January
January 31 1917 – Germany Resumes Unrestricted Submarine Warfare
Fifteen months after calling off the highly effective U-boat attacks against merchant ships nearing the British Isles, German Kaiser Wilhelm II agreed to allow unrestricted submarine warfare on January 31,…
January 31 1950 – US President Harry Truman announces plans for a hydrogen atomic bomb
On January 31, 1950, responding to an escalating Cold War and an imminent need for the possession of thermonuclear weapons, President Harry S Truman announced his decision to approve work…
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