Starbase 19

Starbase 19 was a Federation starbase constructed in the early 23rd century, and was located near Betazed.

In 2375, the base was attacked by Dominion forces as part of their operation to push-out from Betazed. Although the base and 36 starships put up a valiant defence, the base was destroyed with the loss of all hands. (TNG novel: The Battle of Betazed).