[ 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

`` it's finally been a hundred years for the people of Earth,'' spoke the great alien general to his command room, their'mother ship' surrounded by a fleet of a hundred thousand ships, each with the capabilities to destroy a city from high orbit. `` We, the greatest wagers of war in the Universe, ride towards the unknown. It is almost thrilling... how I have missed this feeling.'' 
 
 
 `` We're coming out of the wormhole, General. No signs of any defences on the perimeter of the system.'' 
 
 
 The general flicked their long green tongue in distaste. `` Perhaps I gave them too little time. This wo n't be much of a challenge.'' The fleet of ships entered the system of Earth, the main force holding steady before the field of asteroids which was thought to be a prime defensive position that the Earthlings could reach by now. 
 
 
 Hours were spent sending scouts and gathering information on the system to see how far along the Earthlings had progressed, but they found nothing. Even system wide scans of technology or cloaking systems were turning up negative... for a moment, the general felt a chill run down his spine. Had the Earthlings learned of a way to hide their technology? It felt like a challenge, and one that the great general could n't resist. Perhaps he was being too optimistic about the potential of the Human race. 
 
 
 `` Move our most advanced scouts towards the known flight path of earth. Send two... no, three. Losses will be acceptable.'' 
 
 
 Several hours later one of the scouts reported in to the mother ship after landing on Earth, giving a live video feed as they strolled casually through a city street. `` General, no one is here. We have n't seen an Earthling since we landed. Scout 45 reports the same. The buildings look like they've been abandoned for years.'' 
 
 
 `` Not a single Earthling? Not a hint of resistance? What's going on down there?'' 
 
 
 The scout paused, flipping through a small booklet with a picture of a large airship on the front. The general's eyes were glued to the booklet, satisfied in knowing the Earthlings at least attempted to make larger space-faring ships... though puzzled at how they had n't found any. `` I'm sorry general, but based on the science team's findings, I'm afraid you're not going to get the fight you were hoping for.'' 
 
 
 The general turned a dark shade of purple, obviously displeased. `` Blast it all... let me guess? Disease? Mass extinction?'' 
 
 
 `` No, general.'' The scout turned the page of the booklet, the great general recognizing a photo of a device - very similar to their own wormhole generators. `` We believe mass migration.''
