At the Battle of the Piave River, the Italian Army managed to hold off the Austro-Hungarian and German armies. The opposing armies repeatedly failed afterwards in major battles such as Battle of Monte Grappa and the Battle of Vittorio Veneto. After four days the Italian Army defeated the Austro-Hungarian Army in the latter battle aided by British and French divisions and the fact that the Imperial-Royal Army started to melt away as news arrived that the constituent regions of the Dual Monarchy had declared independence. Austria-Hungary ended the fighting against Italy with the armistice on 4 November 1918 which ended World War I on this front (one week before the 11 November armistice on the Western front).