Zorg Empire

someone plz explain, i just send some light fighter ships over + cargo ship to an enemy, and the attack worked
and this is what i got back

Attack Report [xxx:xxx:xxx]

Attacker Loss: 4.000 Defender Loss:23.300
winnings Metal:0 Crystal:0 Deuterium:0
Debris Metal:7.080 Crystal:6.300


what happened? what do i do?
this isn't clear at all
did i get recourses? :s
help needed

You can click on the " Attack Report [xxx:xxx:xxx] " for the combat details.
You need to totally destroy the enemy's defenses to be able to get some loots.