The Eastern Alliance destroyer is a spacecraft used by the Eastern Alliance of Terra. An Eastern Alliance destroyer tracks the Lunar Avion from Lunar Seven to Paradeen where it eventurally encounters the Galactica. Commandant Leiter commands the destroyer that is captured by the Colonials. Lanceman and Donner are crewmen aboard the destroyer (Greetings from Earth). The destroyer manages to escape from Galactica, and returns to Terra with the Colonials on its trail (Baltar's Escape).
The Eastern Alliance destroyer was repeatedly noted to be far smaller that a battlestar and non-threatening as a contender. In fact, a captured destroyer was briefly impounded aboard Galactica and appeared to be comparable in size to a Colonial shuttle.