The Maquis are a freedom fighter (some would say terrorist) faction operating out of the Federation/Cardassian demilitarized zone following the end of the Cardassian Border Wars. In the aftermath of that war, many Federation colonies were handed over to the Cardassians as a means of pacifying them. These concessions angered the colonists who did not wish to live under Cardassian rule.
The Maquis were wiped out by Dominion forces during the Dominion War.
Military
The Maquis operate antiquated Federation and civilian craft.