A Federation Alliance fleet at the First Battle of Chin'toka.
The Federation Alliance was the accord between the Federation, the Klingon Empire and the Romulan Star Empire to combat the Dominion during the Dominion War.
The first offensive undertaken by all the members of the Alliance was the First Battle of Chin'toka. The Cardassian Rebellion bolstered the Alliance to win the Battle of Cardassia and, ultimately, the war. (DS9: "Tears of the Prophets", "What You Leave Behind")
- According to the non-canon novel, Articles of the Federation, the Gorn Hegemony was also part of the Alliance, though possibly only providing material.