Star King Denak wasted little time in going about setting his house in order: The Admiralty was instructed, in no uncertain terms, to begin preparations for hostilities against the Khanate. Even before that, however, they were to dispatch immediate assistance to the Kithrian Consciousness and Republic of Sivron, our vassals whose fleets were currently operating in Horde space...and who were reported to be on the verge of being overwhelmed and destroyed. "We will never claim to be saints", Denak would later say in an interview, "but we had always promised to do our best to be good stewards of those under our care and protection, and it was painfully clear we had not been living up to that promise. It was way past time that we began rectifying that."
In truth, the Admiralty was only too happy to comply with the Palace's instructions. They had been pleading with (now former) Director-General Pearlfeather to let them do something, *anything* to help Londinium and the rest of the galaxy fight the Khan and his fanatical Horde warriors; but he'd steadfastly refused, ordering them to only engage the Khan's forces if & when our own territory was attacked. Now the leashes were off, however, and the Khan was about to find out that his dream of conquering & uniting the galaxy under his banner might not be quite as easy as he'd originally anticipated...
In the Xikksei's Doom system, hours of desperate -- and increasingly hopeless -- battle was drawing to a bitter close: Admirals Smeggle and Kiy tal Oln, commanders of the joint Kithrian-Sivron task force, had been ordered by their respective governments to try and secure the system from the Lavan Horde, so as to deny them access to the L-Gate located there. Sadly, it appeared their efforts would end up being for nought.
Fleets from two of my subject nations fight a losing battle against a more powerful Khanate/Horde fleet. Brave idiots... As the Yv'Zorak Interstellar Dominion's two strongest vassals, the Kithrians and Sivrons had watched with increasing fear & alarm as the Great Khan's fleets swept across the galaxy in a lighting-fast campaign of conquest...while their overlord did nothing. After quietly taking counsel with each other, it was quickly decided that if their masters wouldn't act, then they must do so themselves; and so their navies were deployed to Xikksei's Doom.
Things went wrong from the beginning, however: Both nations had grossly underestimated the size & strength of the Khan's forces, as well as how rapidly he could redeploy them. Even worse, a bureaucratic error caused a major delay in the Yv'Zorak being informed about the movements of the joint Kithrian-Sivron fleet.
The result was that the Kithrians & Sivrons were almost immediately beset by a Khanate florce far superior to even their combined strength...and with no potential backup coming anytime soon (and that was if the Yv'Zorak should even decide to send any). The sailors & solders of the allied fleet fought valiantly, but it was a losing battle from the start. With most of their ships by now either destroyed, critically damaged, or otherwise out of action, the two admirals reluctantly agreed they had no choice but to withdraw their remaining forces and yield the system to the Horde.
Just as they were about to issue the order to retreat, however, the task force's sensor net exploded with dozens of new contacts, while fleet tactical officers announced something had just come through the L-Gate...
GERONIMO!! Admiral Yuruuk and Peregrine Fleet come riding to the rescue at last.
(One of the many things I love about Stellaris is how it lets you pull off Big Damn Heroes moments like this.) Immediately launching massive volleys of missiles and waves of starfighters from their cruisers and battleships (respectively), the Yv'Zorak quickly began inflicting horrendous damage against the Horde fleet; and the situation only worsened for the enemy once Admiral Yuruuk's corvettes and frigates also entered the fray. Galvanized by their unlooked-for salvation, the Kithrians & Sivrons fought with renewed vigor as well.
[Seriously, their waning combat power actually increased a bit after my fleet showed up to the fight!] As one-sided as the battle had previously been in the Horde's favor, it was now even more so...except in the other direction. Very few of the enemy survived, with the majority of the Khan's warriors choosing to stand and die, rather than flee.
Victory!! And a wonderfully lop-sided one, at that.
Now the *real* battle begins...