Sigma Iotia II

Sigma Iotia II was a planet in or near Federation space, homeworld to a humanoid race known as Iotians.

Sigma Iotia II was first visited by the Federation starship USS Horizon in 2168. During this contact, the landing party left behind a 20th century book entitled Chicago Mobs of the Twenties, which had a pervasive influence on Iotian society, inspiring them to adopt much of the culture depicted in the book, including its casual violence.

A century later, the USS Enterprise (NCC-1701) visited Sigma Iotia II and discovered the contamination caused by the Horizon. Captain James Kirk determined to correct the damage by making a demonstration of Federation strength, and convincing the planet's fractured leadership that the Federation had claimed the world as their "turf." In this way, the planet was united under a single government.