Golden Islands
The Golden Islands are a rival kingdom whose king was defeated in battle by Chang Wang Woe fifty years earlier.
First named in The Royal Book of Oz, ch. 7
after your Extreme Highness had defeated in battle the King of the Golden Islands
Where this is
placed Beyond the desert worked out
read out of the chapters cited on this page, not stated in any one sentence of them
A rival kingdom to the Silver Islands, reached via a magic beanstalk to 'the other side of the world' from Oz - a fairy kingdom beyond Oz's borders, not literal Earth geography.