Tanganyika (modern-day mainland Tanzania) was a former German colony in East Africa. Following World War I, it became a Class B mandate under the administration of Great Britain, while the smaller neighboring territories of Ruanda-Urundi were assigned to Belgium.

The Permanent Mandates Commission was the body responsible for oversight of the territories taken from the defeated powers of WWI (Germany and the Ottoman Empire). It was formally constituted and held its first session in 1921 to review the administration of these mandated territories under Article 22.

The Secretary-General was the chief administrative officer of the League. While the specific tenure could vary in subsequent appointments or resignations, the initial understanding for the office, as seen with Sir Eric Drummond's service, was a long-term appointment, often cited as a ten-year term to ensure stability and continuity in administration.

The Covenant of the League of Nations consisted of 26 Articles. These articles outlined the structure of the League, the rules for preventing war, the administration of mandated territories, and the promotion of international cooperation. It was included as Part I of the Treaty of Versailles.

The Balfour Declaration was a public statement by the British government announcing support for the establishment of a 'national home for the Jewish people' in Palestine.

The Treaty of Rapallo renounced all territorial and financial claims between Germany and the Russian Soviet Federative Socialist Republic.

The Warsaw Pact was a collective defense treaty signed in Warsaw between the Soviet Union and seven other Eastern Bloc socialist republics.

The Treaty of Amiens temporarily ended hostilities between the French Republic and the United Kingdom during the French Revolutionary Wars.

The Treaty of Lausanne officially settled the conflict between the Ottoman Empire and the Allied Powers, leading to the international recognition of the Republic of Turkey.

Barbados removed the British monarch as head of state in 2021 while staying in the Commonwealth.