Lateran Treaty
The Vatican City State is a neutral nation, which has not engaged in any war since its formation in 1929 by the Lateran Treaty. It has no formal military compact or agreement with neighbouring Italy, although responsibility for defending the Vatican City from an international aggressor is likely to lie primarily with the Italian Armed Forces. When presenting the Lateran Treaty to the Italian parliament in 1929, Benito Mussolini declared: ""It is evident that we [the Italian state] will be the necessary guarantors of this neutrality and inviolability [of Vatican City], since, in the remote hypothesis someone wanted to hurt her, he would first have to violate our territory."