From September to November 1914, the war railway bridges over the Mesh at Charleville Mezieres, about the Scheldt at Ename and at Audenarde built, the railway Sodeghem Kortrijk restored with stations and made operational. Then the train was from Roeselare after Moorslede and Ypern put into operationAt the turn of the year 1914/15 were the railways Torhout – Ostend and Thourout Ypres taken over and expandedAt Ostend the heavy guns were brought to the dunes and the lighthouse was set up for blastingIn April 1915, Wilhelm Jakobs led the railway business to Attack on Ypres and during the subsequent battles.↵In July 1915 he became the 5th. Army (Crown Prince Army) transferred and appointed chief of the Baudirektion of this army; on 30 November 1915 he was promoted to major in reserve.