The Krenim were a technologically advanced humanoid species that were native to the Delta Quadrant. The Krenim were first encountered by the crew of the USS Voyager in 2374. The Krenim government was known as the Krenim Imperium.
When Voyager approached Krenim space, they were advised to avoid passing through the area because of political unrest in the area. Captain Kathryn Janeway followed the advice and took Voyager around Krenim space and the Voyager crew learned little about Krenim society, apart from the fact that they were fond of candy bars. (VOY episode: "Year of Hell"; Star Trek reference: Cookbook)