Unnamed Breen ships
List of unnamed Breen ships.

By commander 
 Gor's ship

By encounter

Earth attack force  

This attack force attacked Earth during the Breen's first strike against the Federation upon their joining an alliance with the Dominion. 

Following the attack, Starfleet was destroyed most of the attack force, but it was too late for them to prevent the attack on Starfleet Headquarters. Klingon General Martok gave the Breen credit for their brazen attack, acknowledging that "even my people never attempted that." 

While the Dominion praised the victory, Legate Damar pointed out to Thot Gor that "it's unfortunate that so few of your ships survived the assault." Weyoun chided Damar's response, telling him, "leave it to you, Damar, to point out the one cloud in the sky," before agreeing with Gor that the loss of those ships was "a very small price for such an important victory." ()

Second Battle of Chin'toka fleet  

These ships were present at the retaking of the Chin'toka system. These ships lead the attack with their energy dissipaters on the Federation Alliance assault fleet. At least one ship was destroyed by the  before they annihilated the Alliance fleet. ()

Ship attacking Damar's fighter  

After Damar was lured to Cardassia Prime by Gul Revok, this ship help destroyed the Jem'Hadar attack ship that Damar, Kira Nerys, and Elim Garak had used to reach Cardassia. ()

Ship attacking the USS Defiant

This ship attacked the  shortly before the Breen-Dominion Alliance withdrew to Cardassia Prime. It was destroyed by a  warship when the Cardassian military switched sides to the Federation Alliance during the Invasion of Cardassia. ()

Unnamed starships