The Starfleet Thirty-Third Fleet was a numbered fleet in the United Federation of Planets Starfleet, active during the 24th century.

During the Battle of Ricktor Prime the Thirty-Third engaged the Dominion forces in the Eldronath system allowing for the pursuing Federation Alliance forces to trap the Dominion fleet defeat it. (The Dominion War Sourcebook: The Fires of Armageddon)

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