Birth of Friedrich Ludwig Hohenlohe-Ingelfingen in Ingelfingen, Germany. Hohenlohe-Ingelfingen was a general of the Prussian army in the battle against Napoleon at Jena in 1806 in which the Prussian army was crushed and Prussia became a dependency of France.
Germany, concerned about American public opinion, had taken a policy on May 10, 1916, limiting submarine warfare. On January 31, 1917, however, unrestricted submarine warfare was reinstated. The U.S. broke diplomatic relations on February 3.
Death of Ulrich Wille in Meilen, Switzerland (born in Hamburg, Germany). Wille was a Swiss army officer. After a study of Prussian army organization, he reformed the Swiss army along those lines. He published a new cavalry code in 1892. During World War I, he was commander in chief of the Swiss army.
German General von Paulus surrenders at Stalingrad in World War II.
The U.S. under the leadership of Wernher von Braun and his team launches its first satellite, the Explorer 1.