The Bajoran Militia was a Bajoran military organization dedicated to the protection of Bajor and its territories. The Bajoran Provisional Government authorized this organization, comprised of mainly former Bajoran Resistance fighters.
The rank structure bore resemblance to many Earth armies. Like in Starfleet and Earth armies, officers usually graduate from an academy. In this case, graduates came from the Bajoran Military Academy. (DS9: "Emissary", "Meridian")
The Federation Starfleet agreed to work with the Bajoran Militia to run the abandoned Cardassian space station Deep Space 9 (formerly known as Terok Nor), first in orbit of Bajor and later near the Bajoran wormhole. Captain Benjamin Sisko, from Earth, was DS9's commanding officer from 2369 to 2375, with Bajoran Militia Major Kira Nerys acting as first officer during that time. When Sisko disappeared in 2375, Kira took command. (DS9: "Emissary", "What You Leave Behind")