Star Trek Expanded Universe

Starbase 621 was a Federation Starfleet starbase active in the 24th century located near Tzenkethi Coalition space. (Star Trek: Star Charts)

In 2364 Starbase 621 was considered a likely diversionary target in the event of renewed hostilities with the Tzenkethi, though a more likely target was the Sigma Draconis System in the Hellespont Nebula (Star Trek: Outpost)

Starfleet Intelligence assigned Elias Vaughn to the starbase in 2368, tasked with observing Tzenkethi fleet movements among other goals. (Star Trek: The Lost Era novel: Dawn of the Eagles)

The USS Enterprise-D delayed its visit to Starbase 621 in 2370 to assist the Caldos colony. (TNG: "Sub Rosa")

In 2374, the USS Honshu was en route to Starbase 621 to drop off Gul Dukat to face charges of war crimes, but the ship was destroyed by the Cardassians. (DS9: "Waltz")

In the late 2370s, Jason Bartholomew served as an operations officer on Starbase 621. (Star Trek: Pendragon)

During the Tholian Conflict in the Briar Patch, Starbase 621 was a fallback position for the fleet stationed at Deep Space 12. (Star Trek: Hidden Frontier)

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