1915.
Jan. 1-Feb. 15—Russians attempt to cross the Carpathians.
Jan. 24—British naval victory in North Sea off Dogger Bank.
Jan. 25—Second Russian invasion of East Prussia.
Jan. 28—American merchantman "William P. Frye" sunk by German cruiser "Prinz Eitel Friedrich."
Feb. 4—Germany's proclamation of "war zone" around the British Isles after February 18.
Feb. 10—United States note holding German Government to a "strict accountability" if any merchant vessel of the United States is destroyed or any American citizens lose their lives.
Feb. 16—Germany's reply stating "war zone" act is an act of self-defense against illegal methods employed by Great Britain in preventing commerce between Germany and neutral countries.
Feb. 18—German official "blockade" of Great Britain commenced. German submarines begin campaign of "piracy and pillage."
Feb. 19—Anglo-French squadron bombards Dardanelles.