Why did Japan invade Manchuria?
Japan had a rapidly increasing population and so needed agricultural resources, whilst Manchuria had 200,000 sq km of land & were rich in minerals, forestry & agriculture. They were also hit hard by the depression as as USA & China put up trade barriers on Japanes goods. No trade meant industry declined, so unemployment increased. September 1931- Japna claimed Chinese sabotaged Japan- controlled South Manchuria railway, giving them the excuse to invade Manchuria, renaming it 'Manchukuo'.
What did league do?
After 1 year, an investigation from Lord Lytton showed…