Quite advanced robotics and general technology, but what the seskans truly excelled in was the level of automation. A single seskan could easily command a battleship-size warship on his own, by using extremely efficient programming and vast number of automatas.
Due to their hereditary memory, each seskan was a true jack of all trades that could construct a well defended base together with a small fleet of warships to protect it... on his own, if given enough time. And they didn't even have to eat or drink in traditional sense of the word, since they seemed to be able to filter both from air (either naturally existing or artificial, within the constricts of their base). Both seskan themselves an their installations and units seemed to literally spring up from the ground out of nowhere.
Seskans evolved on a Terran-like planet somewhere in the southern Sagitarius Arm, probably between Sectors 11 and 40 of the Human Space. Several of their coreworlds were located, most of them creating clusters of 5-6 systems, and spread throughout the whole area. Finding out which of it was their homeworld is impossible, due to them being completely destroyed.
They spread throughout great area due to their instincts that literally forced them to expand, however overwhelming majority of such expansion was done by a single seskans surrounded by small armies of robotic servants, fleeing the relentless infighting that plagued their coreworlds. That made all of that colonies temporary, as sooner or later (in most cases later, since they could live up to 200 years) they died out.
They seemed to have a brief contact with Aurums
whom they fough but seemed to be defeated, but for some reason avoided the area of Orion Spur where Earth was located. The reason for this is unknown and an object of hot debate. Majority of their Exiles settled in the rest of the Sagittarius Arm, but their remains were encountered also in Scutum-Centaurus, Red Line in Orion Spur, and in Perseus Arm. There are also some supposedly found in the Mantis controlled part of Norma Arm.
Because of that and generally low number of their ships found in Hyperspace
, it is commonly believed that most of their expansion was done by using a variant of Alcubierre Drive
, that was later on completely abandoned, which split their space according to hyperlanes. The cause of that was unknown, but it contributed to the eventual fall of seskans.
Their coreworlds are believed to be destroyed by an unknown enemy around 1st-2nd century AD. The most possible suspect are screamers, but the wreckage fits that theory only partially. Regardless of the identity, the mysterious enemy was quite thorough. Seskan coreworlds were completely destroyed, with most of their atmosphere scorched completely to make sure their spores are destroyed. The seskan outside of them (most of them not even aware of the devastation due to being cut off from the coreworlds by abandonment of Alcubierre Drive
) simply died out in the next two to five centuries.