Article 16 gave the members of the League the power to levy sanctions or use force against another member that committed a war of aggression. However, this article was very weak in practice, as the Covenant had been written under the assumption that League members would be willing to cooperate with each other. the great powers were reluctant to further damage their own economies by sanctioning another great power, and the policy used was largely
appeasement. During the
Japanese invasion of Manchuria, there was no attempt by the
great powers to invoke Article 16, despite calls to do so from the small powers. Afterward, the League invoked Article 15, treating the invasion as a 'dispute', and the Council referred the case to the Assembly. In
a 35-page report, the Assembly voted 421 to recognize Manchuria as territory under Chinese sovereignty, with the negative vote of the Empire of Japan not counting under Article 15 rules, thus making the recognition unanimous. However, without Article 16, there was no way for the League to enforce this resolution, and the Empire of Japan withdrew from the League a month later. During the
invasion and occupation of Ethiopia by
Italy under Mussolini, Article 16 was invoked for the first (and only) time. Therefore, there was no Council or Assembly resolution mandating sanctions. Instead, Article 15 was initially invoked again, treating the hostilities as a 'dispute', and a non-binding committee appointed by the Council to investigate the dispute (under Article 5) submitted a report explicitly stating that Italy had started a war in violation of the Covenant, and invoking Article 16. The Council then did not vote on the report, but all members other than Italy verbally stated that they agreed with it, and again referred the case to the Assembly. The Assembly then discussed sanctions, and 50 out of 54 members voluntarily agreed to apply them (Italy, Austria, Hungary, and Albania refused). By this point, the
Axis powers had been created, consisting of great powers that had already withdrawn. This left the League powerless against
Imperial Japan's full-scale invasion of China, the
Anschluss, the
German occupation of Czechoslovakia, and the
Italian invasion of Albania. Article 17 made it theoretically possible to apply the sanctions of Article 16 against non-members of the League, but no member made any serious attempt to do this, instead preparing their militaries for the now-inevitable start of World War II in Europe. Article 16, in addition to sanctions, also gave specifically to the Council the power to "recommend" military action against a member of the League that committed a war of aggression. Again there was no enforcement mechanism, the League had no peacekeepers of its own, and members were individually responsible for supplying any military forces. This part of Article 16 was never invoked. Finally, Article 16 gave the League the power to expel Covenant-breaking members. This was only used once
against the Soviet Union for its
invasion of Finland. ==Article 22==