The Inter-War Period
Senior 6 · History (Languages)
The Inter-War Period
Lesson 1 of 4
25 min
On 30 June 1936 Haile Selassie, Emperor of Ethiopia (then often called Abyssinia), stood before the Assembly of the League of Nations in Geneva. Italian armies had invaded his country in October 1935 and taken its capital in May 1936. He had come to remind the League of its promise: that its members would act together against any aggressor. Look at the photograph and ask what the scene suggests about who held power in that hall.

Definition
League of Nations: an international organisation set up by the peace treaties of 1919, which began work on 10 January 1920 and was dissolved in 1946.
Collective security: the idea that an attack on one member is an attack on all, so that all members act together against an aggressor.
Sanctions: penalties, usually economic (a ban on trade or loans), imposed to make a state change its behaviour.
Covenant: the League's founding charter, placed at the start of each peace treaty.
Figure 1. How the League was organised and what it could do. The dashed box shows its great weakness: force depended on members lending their own armies.
| Year | Case | Outcome |
|---|---|---|
| 1921 | Åland Islands: Sweden and Finland both claimed them | Success: awarded to Finland, with protection for the Swedish-speaking people; both accepted |
| 1921 | Upper Silesia: Germany and Poland disputed it after a plebiscite | Success: divided between them; both accepted |
| 1923 | Corfu: Italy bombarded and occupied the Greek island | Failure: Greece was pressed to pay compensation to Italy |
| 1925 | Greece invaded Bulgaria after a border incident | Success: Greece withdrew and paid compensation |
| 1931 to 1933 | Manchuria: Japan invaded this Chinese province | Failure: the Lytton Report condemned Japan, which simply left the League in 1933 |
| 1932 to 1934 | World Disarmament Conference | Failure: no agreement; Germany left the League in 1933 |
| 1935 to 1936 | Abyssinia: Italy invaded Ethiopia | Failure: sanctions left out oil and were soon dropped; Italy kept Ethiopia |
Away from great-power crises the League did lasting work. Its refugee office under Fridtjof Nansen issued "Nansen passports" to stateless refugees, its Health Organisation fought epidemics, and its Slavery Commission led to the Slavery Convention of 1926. Many of these agencies passed to the United Nations after 1945.
History Matters, "Why Didn't America Join the League of Nations?" (short animated documentary, about 3 minutes). Watch for the role of the US Senate and decide how much the absence of the United States weakened the League.
Warning
"The League achieved nothing" is wrong. It solved several disputes between small states in the 1920s and its humanitarian work was real. It failed when a great power was the aggressor. Say that precisely and you show judgement.
Tip
Big powers, small powers. A quick rule for the record: when small states quarrelled, the League often succeeded; when a great power (Italy, Japan, Germany) attacked, it failed.
Important
Discuss. Ethiopia was an independent African member of the League. What did the League's response to its invasion teach Africans about the promises of the European powers?
Practice
Sources and credits
Written by Ganzaa: the diagram, the table, the analysis and the exercises.