The three space warships exited from the warp, and they immediately saw the large siren fleet advancing towards their direction. Yamato, and Andromeda advanced as well using their main thrusters, and auxiliary thrusters at maximum power output. Shinano didn't follow the two space battleships because she has what is considered in the Space Force "weak" offensive armaments.
She will be using her fighters to support the battleships, and harass the siren ships. Yamato also launched her own fighters in a rapid succession as she, and her daughter charged towards the enemy like samurai on horsebacks with their weapons pointed towards the enemy. Once they reached a somewhat good firing range, the space battleships, and the siren ships opened fire on each other.
The siren ships were hopeless against the two wave motion powered space battleships, and their very strong offensive armaments. The siren ships' armor melted as if it was made of butter getting cut in half with a knife that was heat up by a blow torch, their shields that is known to the Space Force for being hard to be penetrated, were easily broken by the blue beams that fired out from the space battleships.
The fighters of Yamato, and Shinano were doing quite well harassing the enemies while also destroying them with their missiles. They dodged, and dodged enemy AA without problems before firing their armaments; there were some siren fighters in the battle. However, they were easily taken care of by the fighters of both Yamato class sisters.
Andromeda activates her grenade launchers located in front of her ship's hull, next to the twin barrel wave motion guns. The launchers fired 6 small blue balls that had electricity surrounding them then traveled quite fast in the vacuum of space before exploding, making the small blue balls expand in size. The explosion destroyed many siren ships due to its large blast radius.
Yamato launched 6 torpedoes from her front hull, the torpedoes traveled through enemy fire to which some of them got destroyed before hitting their marked targets while some successfully hit their targets, destroying them with ease. Yamato didn't stop there, she launched more torpedoes from her side launchers to where they hit their targets soon after from launching.
The wave motion shields of the space battleships were doing well protecting the ships from enemy fire, explosions, and debris. Shinano wasn't left out from the fight as she fired long range missiles towards the enemy ships, the missiles were very fast not letting enemy ships from escaping its wrath before hitting them.
After minutes of fighting, reinforcements arrived with Admiral Jayce onboard on the King George V space battleship. He saw the destruction caused by just three space warships, three of them destroyed 75% of the whole siren fleet while only getting minimal amounts of damage.
"[Jessica wasn't joking about Yamato's power, this was not a battle, but a massacre.]" Jayce thought.
[Timeskip]
Once the battle was over, the three warships were getting repaired by repair ships that joined in the reinforcement fleet. Andromeda, and Shinano were sitting on their respective ships doing their own thing while Yamato was onboard the King George V battleship talking with Admiral Jayce.
"How did you manage to destroy the siren ships? We always have a hard time just trying to get through their strong shields!" Jayce said.
"My, and Andromeda's main armaments are very powerful to where it's power can destroy continents, and small size moons without problem." Yamato said. "But, only me, and Andromeda can possess this kind of power."
"What is that power? From what I researched on, the wavelength of the engine you use is different from our standard plasma fusion reactors." Jayce said.
"I don't know much about wave motion, but I know its potential is too destructive." Yamato said.
"Would you share this power with the rest of the Space Force?" Jayce asked, which made Yamato laugh.
"Share? Hahaha, you must be joking Admiral Jayce, why would I want to share something that can make humans reach Godhood? Why would I want to share this destructive power to you, humans? You will probably cause a war among each other to obtain this power." Yamato said. "This power I hold only belongs to me, Andromeda, my sister, and my Admiral. No one else. Goodbye Admiral."
Yamato leaves Admiral Jayce without letting him speak further, she went back to her space battleship before taking off with her daughter, and sister once their repairs were finished. Admiral Jayce was a bit upset with Yamato's words because she sounded like she was insulting the human race, the race who brought her to life in the first place so many years ago.
However, he understood what Yamato meant if she did share the wave motion technology. Weapons of mass destruction capable of laying waste on entire continents or small moons will be built using the technology, and there might be another cold war or civil war going to start up.
Admiral Jayce watched the three space warships enter the warp, once they were gone he went to contact Yamato's Admiral. Admiral Justin who was currently trying to defend a small world from another siren fleet.
"How was Yamato able to obtain her power? She went missing after the victory against the Sirens back on Gaia so many years ago." King George V said.
"I don't know, not even my grandfather knows what happened to her." Jayce said.
"How did the other Admirals react when Yamato was confirmed to be alive, more powerful, and advanced than our ships?" King George V asked.
"I don't know, but I know that Justin had to cover up some things, and even threatened the entire UN government, and Space Force when they asked to hand over Yamato to them." Jayce said.