The League also participated in the 1928 Kellogg-Briand Pact, which was to ban the war. It has been successfully adapted by more than 60 countries. When Japan invaded Mongolia in 1931, the League proved incapable of imposing the pact. The peace treaties had established reparations for Germany that should have done some kind of repair and what it would not do, which prompted France to occupy the Ruhr region to ensure the exploitation of the property, in order to ensure the reparations defined in the pact. This is a conflict that is not dealt with by the League of Nations. It is a conflict that France can provoke as a result of the Treaty of Versaille. This annexation of German territory will lead to this situation with a whole series of consequences. The occupation of the Ruhr would weaken France`s interests. In this context, a State that is a permanent member of the Council may also annex the territory of another state, which does not automatically specify the measures provided for by the League of Nations Pact.
The first major test of the pact came a few years later, in 1931, when the Mukden incident led to the Japanese invasion of Manchuria. Although Japan signed the pact, the combination of global depression and the limited desire to go to war to preserve China prevented the League of Nations or the United States from taking steps to impose it. Other threats to the peace agreement were also posed by the signatory countries, Germany, Austria and Italy. It soon became clear that there was no way to enforce the pact or punish those who broke it; he never fully defined what self-defense represented, so there were many paths around his terms. In the end, the Kellogg Briand Pact did little to avoid World War II or any of the ensuing conflicts. His legacy remains a statement of idealism expressed by the proponents of peace in the interwar period. Frank Kellogg was awarded the Nobel Peace Prize in 1929 for his work on the Peace Pact. Eight other states (Persia, Greece, Honduras, Chile, Luxembourg, Gdansk, Costa Rica and Venezuela) joined the treaty for a total of 62 states. In 1971, Barbados announced its accession to the treaty.  Articles 10, 15 and 16 regulate collective security and give greater weight to collective security, in the sense that a state that has attacked another state would have attacked all other members of the League of Nations. Article 16 states that “when a member of society resorts to war in violation of the obligations of Articles 12, 13 or 15, it is ipso facto considered an act of war against all other members of society. They undertake to immediately terminate any commercial or financial relationship with the company, to prohibit any relationship between their nationals and those of the State, in violation of the agreement, and to terminate any financial, commercial or personal communication between nationals of that state and those of another state, whether or not they are members of society. When a member resorts to war, it is automatically assumed that he has attacked all other members of society.
They undertake to terminate immediately all commercial, financial and personal relations with him.