The league were successful in a few country disputes such as the Aaland Islands dispute. The league averted war and they dealt with it effectively so that meant that the league was successfully sorting out problems and avoiding war.
The League brought many countries together and there was a lot of co-operation between countries. Countries began trading with each other and countries that had previously not been friends became friends and sorted out their problems. Because of this that meant the league was successful because countries were becoming friends and this was another factor that helped avoid war.
The league operated fairly, in the assembly everyone could vote and all the votes had to be unanimous.
Collective security in the league meant that the league was a success because the smaller countries felt safe because the bigger countries could protect them if anything was to happen.
However the league wasn’t completely successful in the 1920s.
The league wasn’t successful with disarmament because they didn’t start to arrange a disarmament conference until 1926 and the conference didn’t even meet until 1932. Countries also weren’t prepared to disarm all of their weapons. So this meant that the league wasn’t a success.
Even though the league managed to sort out some disputes between countries it wasn’t successful at sorting them all out, for example they didn’t sort out the Vilna dispute successfully. Poland were occupying Vilna during the Russo-Polish war and after refused to leave. The league did nothing, they just let Poland stay.
Although the voting in the league was fair, the voting process was very slow which meant decisions of who was going to be elected couldn’t be done efficiently.
The league had selfish members in it like Britain and France who weren’t always prepared to do things, the league didn’t have USA in it. Without the USA the league was like a lion with no teeth they didn’t have the USA to back anything up. Without the USA economic sanctions were quite pointless because if the league put a sanction on a country to stop it trading with other countries in the league it could always go to the USA for trade, which is just as good.
So in conclusion, the league was successful in the 1920s because it managed to improve the lives of millions with its humanitarian aim. However it was also unsuccessful because the league was lacking the USA as a member and the USA could have improved it greatly.
