1. Italy was half-hearted when it joined the Allies. After the outbreak of World War I, Italy was on the verge of being put up for sale. Austria-Hungary formally consulted its two allies, Germany and Italy, before deciding to declare war on Serbia. Relative to Germany's unreserved support for its allies. Italy's answer was opportunistic and cowardly: Italy instigated a defense clause that exempted it from military action, thereby keeping itself out of the fray and remaining "neutral." When the Austro-Hungarian Empire suffered heavy losses from Tsarist Russia on the eastern front, Dr. Germany had to allocate precious troops from the fierce fighting on the western front to support the Austrian army to prevent Tsarist Russia from rushing through the Carpathian Mountain passes to sweep the Hungarian plains. Almost at the same time, another imprudent campaign by the Austro-Hungarian Empire against Serbia at the Battle of Bar also suffered a complete failure. Faced with the powerful external forces and weak internal forces, the Butou Empire suffered repeated defeats. Italy began to make moves and no longer wanted to remain neutral.

2. Italy demanded Trieste, the entire Slovenia, and the Adriatic coastal areas of Croatia within the territory of the Austro-Hungarian Empire. Germany advocated partial satisfaction of Italy's demands, even if it meant ceding Trieste to it, in exchange for Italy at least remaining "neutral." But Austria-Hungary rejected Italian territorial claims even under German pressure. In order to win over Italy, the Allies were much more "generous" in giving Italy the territory of the Austro-Hungarian Empire: they not only explicitly promised that Italy could acquire Trieste, Fiume, Istria and Dalmatia, but also gave mainly the The Greek-inhabited Dodecanese Islands may have been given to Italy. It was also agreed that Italy could expand its African colonies after the war and could participate in the carving up of Turkish territory. In order to relive the dream of the Roman Empire that turned the Mediterranean into a lake, Italy actually believed in the empty promise of the Allies and happily drank the bowl of rice soup. So in April 1915, Italy signed the Treaty of London with the Allies in Rome, stipulating that Italy would declare war on the Allies one month after signing. On May 23, 1915, Italy declared war on Austria-Hungary. Out of fear of Germany, Italy did not declare war on Germany. Only on August 28, 1916, when Italy felt safer and no longer feared German retaliation, did it declare war on Germany.

Of course, Italy’s cash flow was very poor after joining the war: it was busy but it didn’t help, and it added to the chaos. Finances were depleted, making it an economic burden for the Allies. The Italian army, which had not yet recovered from the 1912 Libyan War, was poorly equipped and poorly trained. The Alps and Po River fronts were completely defeated: the total strength of the Italian Army when the war was declared was only 870,000. By the end of 1916 alone, the Italian army suffered 700,000 casualties. The navy managed to cope by relying on precious fuel shipped thousands of miles from Britain. Later, if Japan hadn't sent a naval task force to take over the escort mission in the Mediterranean, and with the help of the French navy, the small navy of the Austro-Hungarian Empire would have been sealed in the Adriatic Gulf.

It is said that when William II informed Frankenhausen and Ludendorff that Italy had finally betrayed its alliance, Ludendorff said the famous saying: Your Majesty, if Italy enters the war as our ally, I need You give me 80 divisions to protect it. If it fights us as the enemy, I only need 40 divisions to defeat it.