Tholian Assembly

The Tholian Assembly was an interstellar nation-state of the Tholian species. In the Alpha Quadrant, the Assembly bordered both the Federation and the Klingon Empire.

While there had been sporadic contacts between the and the Assembly during the first century of the former's existence, in 2268, USS Enterprise had a hostile encounter with at least two Tholian ships as it attempted to salvage USS Defiant, which had fallen into an interphasic rift. 

Following this encounter, the Federation constructed an unknown number of Salem-class space stations at the border of Assembly space.

Ironically, Shadowstar Station -- which based on a modification of the Salem design -- was attacked by Tholian forces in 2354. (: "Blindspot")

A series of conflicts between the Assembly and the Federation in the 2340s and 2350s was known as the Federation-Tholian War.

In 2381, following the Borg attack on the Alpha Quadrant -- which resulted in the destruction of many worlds and the deaths of 90 billion beings -- the Assembly joined with several other spacefaring governments to form the Typhon Pact.