You can use any of the following treaties and information in your answer:

LEAGUE LARGELY FAILED TO BRING ABOUT DISARMAMENT IN THE 1920'S

1921 Washington Conference
USA, Japan, Britain, and France agreed to limit size of navies.

Locarno Treaties (1925)
Germany agreed borders with France and Belgium as in the Treaty of Versailles (but nothing on Eastern borders)
Britain and Italy agreed to protect France if Germany attacked.
Germany accepted Rhineland as a de-militarised zone.
France and Germany agreed to settle future disputes through the league.
France was really pleased - fireworks and church bells
This paved the way for Germany to join the League of Nations in 1926

Kellogg-Briand Pact (1928)
Signed by 65 nations
All parties condemn war as a means of settling disputes
Noting to say what would happen if someone did declare war.
This was looked on as a turning point in History and people thought the world was getting a safer place

Other Treaties
Dawes Plan 1924 - USA lent money to pay reparations
Rapallo Treaty 1922 - Russia and Germany re-established diplomatic relationship
Young Plan 1929 - Reduced Germany's reparations

Economic recovery meant that countries were less likely to fight each other.

1930's

Disarmament failure in 1930's
1920's international relations better so disarmament didn't matter
1930's league was under more pressure
Germany was angry that no other nations were forced to disarm
1923 Disarmament conference resolved to:
Prohibit bombing of civilian populations
Limit artillery size
Limit tonnage of tanks
Prohibit chemical warfare