Extraterrestrial invasion

Definition and stakes

Garrett Putman Serviss,  Edison's Conquest of Mars

“ Even while the Martians had been upon the earth, carrying everything before them, demonstrating to the confusion of the most optimistic that there was no possibility of standing against them, a feeling—a confidence had manifested itself in France, to a minor extent in England, and particularly in Russia, that the Americans might discover means to meet and master the invaders.
Now, it seemed, this hope and expectation were to be realized. Too late, it is true, in a certain sense, but not too late to meet the new invasion which the astronomers had announced was impending.
”
Source: Gutenberg

Portrait of Kris Neville Kris Neville,  Earth Alert!

“ And if the earthlings were not destroyed, if the invasion of Earth failed, retaliation from the planet would not be long coming. Once the Earth located the space station (and Earth would, once Earth realized its existence) even human normals would be able to destroy it—one rocket with an atomic war head would do—long before the interstellar ship returned.
Walt could not fail; the invasion could not fail.
**Let's try to make peace with the earthings,** one of the aliens thought. **It's better than ...
”
Source: Gutenberg

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