A formation of the Cardassian military commanded by Gul Jasad, whose warships threatened Deep Space Nine in the first days of the Federation presence there.
The Cardassian armed forces are organised into numbered orders, each of which appears to combine warships and troops under one command. The Seventh Order is the first to be named on screen.
In Emissary, Gul Jasad identifies himself as an officer of the Cardassian Guard, Seventh Order, when he arrives at the station after Gul Dukat's ship vanishes into the newly found wormhole. Refusing to believe the wormhole exists, he prepares to attack, and Kira and O'Brien bluff him with a show of the station's few weapons until Sisko returns.
Other orders are mentioned later in the series. In Empok Nor, Garak recognises the soldiers left to guard the abandoned station as belonging to the Third Battalion of the First Order.