Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Nauru Island Agreement was a joint trusteeship document between the governments of the United Kingdom, Australia, and New Zealand regarding administration of the Pacific island of Nauru. It was ratified in London on 30 May 1923. Nauru, officially the Republic of Nauru and formerly known as Pleasant Island, is an island country in Micronesia in the South Pacific. Its nearest neighbour is Banaba Island in Kiribati, 300 kilometres (186 mi) to the east. Nauru is the world's smallest island country, covering just 21 square kilometres (8.1 sq mi). With just over 9,265 residents, it is the second least-populated country after Vatican City.