sentences:  The Italian army was forced to call the 1899 levy, while that of 1900 was left for a hypothetical final effort for the year of 1919.The Central Powers stopped their attacks in 1917 because German troops were needed on the Western Front while the Austro-Hungarian troops were exhausted and at the end of much longer logistical lines.The offensive was renewed on 15 June 1918 with Austro-Hungarian troops only in the Battle of Piave.