A loose confederacy of habitats.
The league exists to act as a both a non-aggression treaty, and a defensive pact.
A small joint-force fleet is maintained to assist in anti-piracy and minor defensive operations.
Circus is the largest member
Other members include (in no particular order):
The Library of Atoz-Theln was extended protectorate status.
Though no offical treaty exists, the League of Habitats employees a larger than average force of Circean Witches.
Having no centralized government, The Place of Penance Habitat is not officially a member, though many Deodand find their way into league habitats.
The Moravecs of Telos never offered any official response to the only invitation the league ever extended. The envoy reported an attitude of indifference and amusement among the Telosian political elite, and his hull was never recovered.