When the Galt first attacked the small backwater commonly referred to as "Earth," they assumed that, like any other proper species, the humans would segregate battle by sex. This assumption was their first mistake. The Galt used a tried and true tactic that targeted only those of a specific gender chromosome. 

As always, a percentage of males survived for some reason or another, but the Galt did not care about them; they saw only a world filled with materials and future slave-mates. When the first landing party touched down, they approached the city nearest them and vanished from the comm-nets of their allies. This was not unheard of for a landing party to encounter traps laid out as a last line of defense, but it kept happening.

"What is happening?" Galt commander Yilk asked of his subordinate. None could answer in any way that he found acceptable. "Very well, I shall investigate myself." He said, setting off with his honor guard to land near the site of the first disappearance. When he touched down, he looked at the sign outside the seemingly vacant city; his translation AI kicked in and informed him that it read, "Welcome to Dallas, Texas, Drive Friendly - The Texas Way."

The next moments would haunt Yilk for the remainder of his life; seemingly from nowhere, a thousand females of the local 'Human' population were in front of him and his honor guard of fifteen of the best Galt his people could offer. He opened his mouth to address the women who had surely come in response to his presence, and then the world exploded around him; in a matter of moments, his honor guard was dead, and he hurt for some reason in one of his legs. 

One of the women, who seemed to be more elderly, was being led to the corpses of his honor guard by a younger one. A third, who seemed even younger, was dashing ahead in a way that Yilk would call playfully. As the youngest of the three got to bodies, she lept from one corpse to the next, pointing a small metallic object at the heads and moving her finger, followed by a loud sound and the obliteration of a Galt's face. When she got to Yilk, she stopped and spoke.

"Grandma, this one is still alive." The young one left him after carefully pulling a railgun almost the same size as she was out of his reach.

The elderly woman approached. "Now, what do we have here?" She seemed amused. "I know that you lot have a translation ability or technology, so if you have any desire to live, tell us who you are and why you have come." By this time, the rest of the crowd had arrived and was stripping his honor guard of weapons, armor, clothing, everything.

"I am Yilk, ninth son of the Emperor of the Galt, rightful ruler of the galaxy, and I demand that you submit!" Yilk spoke as he tried to rise, and the middle-aged woman helping the elder placed a slender foot on his throat, pushing him back down, while others pinned his arms.

"You hear that girls?" The elderly one called out. "We have to submit to the emperor's son." The crowd seemed to find this incredibly amusing as they all laughed harshly. "You think that we should submit to the ones who sent that disease that killed our husbands, our sons, our fathers?" She asked, a venom in her voice that sent shivers down Yilk's back. "I don't think we will. Indeed, you didn't kill them all, and all the remaining men have been given a task that I'm sure they will find both a blessing and a curse in rebuilding humanity. Going forward, if you value your species, you should run back to Daddy and tell him that Earth is not worth the risk."

The woman standing on his throat slammed what looked like a primitive railgun into his head, and he blacked out. When Yilk came to he was back on his carrier ship, he had a note in his pocket that his AI translated, "Remember the love of a mother, the love of a sister, the love of a daughter. And know that you brought this on yourself." was what it said. 

Yilk laughed and went to the bridge to find all the ships but his had been destroyed. Yilk fled, returning to his homeworld intending to bring back an armada capable of destroying the planet. That was the last anyone ever heard from the Galt.

Centuries later, when humanity had joined the galaxy and met with other races, it was revealed that humanity's remnants, in only a few short days, had extracted the virus that had killed their men and modified it to act on any and all Galt, save for one whose name had been Yilk, as they wanted him to watch his race die, and be unable to stop it just as the women of Earth had been powerless to stop the death of their loved ones.