sentences:  On 24 October 1917, the Central Powers troops broke through the Italian lines in the upper Isonzo at Caporetto (the modern Kobarid) and routed the 2nd Italian Army.The Italian army commanders had been informed of a probable enemy attack, but had underestimated it and did not realize the danger posed by the infiltration tactics developed by Germans.From Caporetto the Austro-Hungarians advanced for south-west, reaching Udine after only four days.