Militarism is the belief that a country should maintain a strong military and be prepared to use it aggressively to defend or promotenational interest
Treaty of Brest-Litovsk is the peace treaty signed on 3 Mar 1918 between new Bolshevik government of Soviet Russia and the Central Powers (Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire), that eneded Russia's participation in WW1
The War Guild Clause is another name for Article 231 of the Treaty of Versailles which stated Germany was to assume all responsibility for the damage caused during The First World War.
Self-determination was the principle that people have the right to freelychoose their sovereignty and international political status with no interference from other countries
Mandate is territory assigned to another power under a mandate of the League of Nations
Colonies is a country or area under the full or partial political control of another country
Conscription is compulsory military service
Reparations is the compensation for war damage paid by a defeated state