Feb. 10—Germany sends memorandum to neutral powers that armed merchant ships will be treated as warships and will be sunk without warning.
Feb. 15—Secretary Lansing makes statement that by international law commercial vessels have right to carry arms in self-defense.
Feb. 16—Germany sends note acknowledging her liability in the "Lusitania" affair.
Feb. 16—Kamerun (Africa) conquered.
Feb. 21-July—Battle of Verdun. Germans take Ft. Douaumont (Feb. 25). Great losses of Germans with little results. Practically all the ground lost was slowly regained by the French in the autumn.
Feb. 24—President Wilson in letter to Senator Stone refuses to advise American citizens not to travel on armed merchant ships.
Feb. 27—Russians captured Kerman-shah (Persia).
Mar. 8—German ambassador communicates memorandum regarding U-boat question, stating it is a new weapon not yet regulated by international law.
Mar. 8—Germany declares war on Portugal.
Mar. 19—Russians entered Ispahan (Persia).