Beta Thoridar
Beta Thoridar was a star system in the Beta Quadrant. 

In 2256, the system's location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the . It was located within the territory of the Klingon Empire. ()

A year later, the system's location was labeled on the star chart showing the trajectory of Lieutenant Spock's shuttle. ()

In 2258, the system's location was labeled on a star chart seen on the main viewscreen of the . ()

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol was a red Klingon Empire logo, indicating its affiliation with the empire. () 

In late 2367, at the start of the Klingon Civil War, the House of Duras gathered a large fleet near this system while preparing to launch an offensive against Gowron's forces. ()

In 2399, the system's location in neutral space was labeled on a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. ()

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