Battle of EN-482

Border skirmish between the Hyperion Federation and HEX Mainframe. The first battle the two entites fought that is not their first contact.
During the entire event, the 2 factions were in a constant race for what could adapt first - the TGX Composite of the HF or the Omnicannons of the HM. The HF made lots of use of Subspatial Starships. They could be used to hit enemy forces while being simultaneously hard to detect. The HM can find Subspatial Starships, they also have Subs of their own. Arbalest - Class Subspatial Starships were commonly used for flanking due to their high speed and Subspatial Starship nature.
As the HF didn't know much about the HM at the time, they attempted the Thunder Doctrine, involving heavy use of Thunder Cannons and Positron Cannons used in combination. They soon found out, though, that HM armour adapts - even better than TGX Composite. The doctrine was too predictable, and the HM made use of its exceptional pattern recognition.
The HF did manage to destroy most of the HM forces though. The Thunder Cannons proved quite powerful against their nanobot armour, the very high voltages frying electronics.

The Conflict

Outcome

Some of the starship crews of the HF are assimilated into the HM. No one made it out alive.
The HM, despite having assimilated a number of HF starship crew members, were not able to recover any HF technologies because the HF would trigger self-destruct on any technology they could obtain, even as far down as TGX composite scrap, and the HM was not able to recover even basic information about that material other than what they saw and learned in the battle.

Aftermath

The aftermath of the battle has led the HF to rapidly develop new methods to counter these new rapidly adapting starships. They realised the HM has a high reliance on advanced technology - much like themselves. They thus employed many ewar measures, and made doctrinal adjustments that favoured highly unpredictable movements - in attmpts to help them come across the HM's key adaptation strength. These have placed a lot of uncertainty in the HM's estimation of HF doctrine, securing them a future and many future wars with the HM. As such, the HF saw the battle as not a total loss; despite the fact that so many lives were lost. The battle also secured warlike relations between the HF and HM for a long time, possibly for eternity as long as both exist.
Due to lessons learned, the next several battles against the HF would not prove as sucessful. For a long time, the HF still struggled but learned to adapt rapidly to a rapidly adapting enemy which helped them to fight the HM off. They also figuerd out how to 'deassimilate' people from the HM, allowing the HF to conquer and capture them.

Conflict Type

Battle

Conflict Result

Phyrric HM Victory