I believe it was the use of poisonous gasses, which they not only used on the Jews but in war too......., or The newly created Machine gun<span />
Battle of Belleau WoodJohn J. Pershing James Harbord,Crown Prince Wilhelm
Loss of territory drained roman funds
Answer:
There are currently two predominant theories regarding the theft of the Mona Lisa. Peruggia said he did it for a patriotic reason: he wanted to bring the painting back for display in Italy "after it was stolen by Napoleon".
Explanation: