[ WP ] Aliens come to Earth in hoping to wipe us out and take over the planet , but are honorable and gives us a fighting chance . They announce they will return in 100 years so as to give Earth a chance to prepare and defend itself . Neither side expected what the other would bring to war

100 years. It had been 100 long years since the visitors had arrived on Earth with a warning of doom. Whether this warning was birthed from a sense of honor or just a humorous taunt, it did n't really matter. We were given 100 years to develop a defense system that could repulse an attack from their fleet and we spent every day creating the weapons of our salvation. The world's greatest minds, brought together for a solitary purpose, destruction. All means of weaponry were tested, from the conventional, to the more abstract, until mankind's greatest weapon of war was developed. The Titan. A multi-platform station orbiting the planet, The Titan provided the greatest concentration of nuclear warheads in the known galaxy, backed by over 400 Class III Trident Launchers and an impressive fleet to boot. The Titan would be our salvation, a project culminating from the the work of nearly every spacefaring nation on the planet. Our salvation, we learned, would not be so easily earned. 
 
 I took my seat in the long hall as one of the last to arrive. In this room we had aggregated the leaders of every nation and military in the world. Every row presented a line of chairs farther than the eye could see and all angled towards one large viewing monitor. The monitor fizzled and with a brief line of static, the ominous voice that had given us our warning all those years ago echoed through the hall. 
 
 `` Humans. This concludes the 100 rotations of your planet around its sun. Are you yet prepared to defend yourselves?'' The monitor flickered and the hall quickly became illuminated with the reflective glow of the visitors face. 
 
 `` Y-yes we are. If we must.'' The voice was hardly confident, but still spoke with a vague zeal that could only indicate the syntax of a politician, our dear leader, the President. 
 
 `` Excellent. Your technology is rudimentary, at best, but this scientific endeavor was most enlightening.'' Hushed gasps and quiet conversations emanated throughout the hall, a feeling of possible hope. 
 
 `` So this is not a declaration of war, but rather one of peace?'' The President had already jumped from his seat and was awaiting the visitor's response with gleeful hesitation. 
 
 `` Not quite. You see, there are millions of duplicate planets much like this ripe with resources for the taking. Only recently have our scientists deduced the secrets to inter-dimensional travel. These planets hold an unending supply of goods that will satiate my people for life. The only issue was the stress brought upon our armies by repeated wars. Your planet could never resist my will, but a thousand of you would soon bring us to ruin.'' 
 
 `` I... uh, I'm not sure I understand.'' The President no longer expressed fascination with the visitor's words, but rather a look of certain fright. 
 
 `` It is important, you know, that your endeavors will provide us with important research on your defensive tactics. Your quest for salvation has planted the seeds of your own destruction. When we warned you all those years ago, we did not expect you to create a weapon that could destroy us, but one that would be effective against the only enemy you have ever known...'' Just as the visitor was about to finish his sentence, a lone soldier slid through the front door of the hall and immediately approached the President. 
 
 `` Sir... sir, it is the Titan. She's been activated,'' he pantingly noted. 
 
 `` Who authorized this activation!?'' The President, fully realizing his situation took one last look to the monitor before the visitor, with a sly grin, initiated the Titan. 
 

