Intercept the Federation Fleet in the Kahless Expanse.
The Kahless Expanse is "south-east" of Qo'noS in the Gorath sector.
Locate the Federation Ships in the Kahless Expanse.
Fly within ~0.37LY of "Kahless Expanse Readings" and scan them. Some will turn out to be nothing but others will trigger combat.
Defeat 6 Federation squadrons. (0/6)
Once you have scanned a reading that initiated combat, you will need to engage and defeat six groups of Federation ships. At level 6, enemies are level 8. Frigates come in groups of two/three; cruisers, escorts, science vessels, and battleships travel solo. Fighters and shuttles come in groups of about six.
Return to Lieutenant Commander Mara
This mission is complete. Return to sector space and hail the KDF.