 Complete the following phrase:  In May 1915, Italy attacked AustriaHungary. Italy was the only military opponent of AustriaHungary which had a similar degree of industrialization and economic level; moreover, her army was numerous 1,000,000 men were immediately fielded, but suffered from poor leadership, training and organization. Chief of Staff Luigi Cadorna marched his army towards the Isonzo river, hoping to seize Ljubljana, and to eventually threaten Vienna. However, the Royal Italian Army were halted on the river, where 