It can readily be seen that this situation placed the sea commerce of the United States, as well as that of all other neutral countries, in a most dangerous position. Up to March 1, 1915, about twenty merchant vessels of various nationalities were destroyed or damaged in the war zone established by Germany, including Dutch, Norwegian, Danish, American and British ships. GREAT GERMAN VICTORY IN EAST PRUSSIA After a difficult campaign against the Russian invaders in East Prussia, the German army, by the masterly strategy of Field Marshal von Hindenburg, practically annihilated the Russian Tenth Army of 150, men, completing the task February 20. It was the most spectacular campaign in the history of modern warfare. The object of the German commander was not only to free East Prussia from the Russian invasion, but to completely capture the Russian Tenth Army. He sent one column in from the south to drive back the Russians who occupied the Mazurian lake gateway to East Prussia, and another column from the north was swung around in wide circles to the east and south, aiming to join hands with the southern German column, thus cutting off the Russian retreat. This movement would have succeeded absolutely except for delay in passing through the swamps, caused by mild weather which broke up the ice. A commander of one of the German corps said: "Nature has always helped Russia. Two days of hard frost and we should have had every man." In the south also nature aided the Russians. There the German hosts attacked the enemy in the face of a driving snowstorm from the north, which hindered their operations but did not prevent them from gaining a victory which resulted in freeing Prussian territory from the invader. ALLIES FORCE THE DARDANELLES