World War One Diary for Wednesday, February 21, 1917:
Trentino: Italian guns destroy Austrian railhead at Tarvis.
Macedonia: General Lyautey approves Sarrail‘s spring offensive plan submitted February 8 whose final objective is Sofia. Sarrail finally consults Milne on February 28 and they agree on Lake Doiran sector British attack.
Palestine: British yacht Managam visits Athlit, contacts NILI Jewish spy ring and delivers funds.
Britain: New blockade orders insist ships sailing to neutrals with access to enemy enter a British port for examination.