The Russians want to relieve the pressure of their French allies at Verdun by starting a huge spring offensive near Lake Narroch. But this is not the only reason: The spring thaws are coming and the Germans on the Eastern Front have the high ground. At the same time, the epic struggle at Verdun is continuing: Neither the French nor the German Army can gain a decisive advantage at Fort Vaux. At sea, the British use the depth charge successfully for the first time and the German ship Greif tries to run the British Blockade.
