 Complete the following phrase:  In the Battle of the Vistula River, which began on 29 September 1914, Puhallos troops advanced into Russian Poland as part of the 1st Army. After fighting at Ivangorod, his troops were forced to retreat again at the end of October 1914. After heavy fighting on the Nida, his V Corps was transferred to the Carpathian Mountains at Christmas 1914 where, as part of the Austro-Hungarian 3rd Army, it took part in the unsuccessful struggle to relieve the 