Owing to the great power of the Concorrl, only one invasion of Concorus has ever taken place in recorded history. The invasion was executed by the Palaedonii Fourth Segment after a number of valuable minerals were detected on the planet's surface.
Considering the planet had not yet made the breakthrough into space, the Palaedonii believed that obtaining the minerals would not be hard. However, the strong loyalty of the Concorrl prevented the Palaedonii from obtaining the minerals, and eventually the invaders had to withdraw to avoid losing too many soldiers.
In consequence, the Concorrl and the Fourth Segment remain enemies, despite attempts by the Concorrl to expand relations. Nevertheless, the Concorrl remain on good relations with the other Palaedonii Segments.