DISCLAIMER: WorldWar and its related works are a registered trademarks of its creator/author Harry Turtledove and the publisher Del Rey Books.
A/N: Ideas and inspirations are taken from the "Race 2012 Invasion map game" on alternatehistory . com and AlbertG's WorldWar.
"If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans." - Stephen Hawking
Preface
The planet Tau Ceti inhabited a race of short, lizard-like aliens, ethnocentrically dubbed as the "Race." For hundreds of thousands of their years, the Race was originally divided into competing nations, until the various Race nations unified into a single government headed by an Emperor, who is elevated to a god-like status and deeply revered by his people, and ushering a dynastic era of peace. They are a very conservative species, training their generations on their foundation of obedience and servitude to their Emperor that is ingrained into their culture. They abhorred change, only accepting slowly, meticulously steps in their careful progress, as they view any innovation and advancement would possibly destabilize their civilization. Although the Race favored a stable society, consequently one of the problems of that stabilization without conflict was population. As their species increased, to solve their overpopulation that was numbering in the billions, the Race sought to expand outward into space.
Armed with huge star-faring ships, filled with radar-guided missiles, machine guns, fighter jets called killercraft, landcruisers (tanks), and even nuclear weapons, they arrived with several million soldiers with the intent to subject the helpless aliens for the glory of the Race. In their conquest, they encountered the aliens of the Halless (Epsilon Indi) and Rabotev (Epsilon Eridani) systems. These aliens were woefully; technologically inferior to the Race and didn't have a chance in fighting back while armed with spears, arrows, catapults, and stone. An ethnocentric species, the Race was reared and taught into believing their society and themselves as the epicenter of the universe, and that any other intelligent species are viewed less than they. The swift conquest of the Halless and Rabotev species reaffirmed their imperialistic beliefs.
For the next thousand years, the Race sent probes to Earth (called "Tosev 3" by the Race) to find "Tosevite" civilization underdeveloped that used the sword. Pleased with their findings, the Race made preparations in their next conquest. In a mere sixteen-hundred Race years, or eight-hundred Earth years, they would invade and bring Earth into their empire. Believing that the hundreds years of preparation would be enough time to take over the planet within a few months or maybe weeks or days in comparison to their previous subjugation of the Halless and Rabotev systems. That conclusion was the gravest mistake the Race ever made.
The Race arrived in Tosev/Earth orbit eight-hundred years later to find the planet at a fully industrial age already in conflict, known to humans as World War Two. Although the Race are technically superior over humanity in technologically, their rude entry into the war brought the warring powers of the Allies and Axis into a ceasefire and waged on a common foe that saw the entire southern hemisphere of Earth under the yoke of the Race, and a tentative armistice between humans and the Race. The Race bide their time with the belief that the entire planet would inevitably fall into their empire. Unfortunately for them, however, for the next century, humanity alarmingly advanced into the Race's technological tier and beyond when they discovered faster-than-light travel.
By then, the future remained uncertain for the Race that has now eclipsed by their "Tosevite" foes.
But that was in another universe.
Fate would take a drastic turn, for the Race added another seventy years to already eight-hundred Earth years to the overall plans to implement a small but critical improvement related to killercraft. To the Race, it was a small period of time. To the majority of the humans living in the 21st century, World War Two was ancient history.