ICSE Class 10 Answered

The First World War involved total mobilisation national resources and all economic activities were subordinated to the war needs.  Warring parties also sought to stop goods like food, raw materials and war materials from entering enemy territories from outside.  In 1916, Germany initiated submarine warfare against Britain and sunk many of its warships. However, France defeated Germany in the Battle of Verdun. The British further tightened their blockade of Germany to counter submarine warfare and continued blockading German waters until her defeat in the Battle of Dogger Bank.