A group of strangers trapped in a farmhouse find themselves fending off a horde of recently dead, flesh-eating ghouls that are ravaging the Northeast of the United States.
In The Day Mars Invaded Earth (1963) Sci-Fi classic movie, the Martians are not the invaders, they're the ones protecting themselves from us after a US space probe lands on their planet.
In 2020, after the colonization of the moon, three spaceships are launched from Lunar Station 7. They are to explore Venus under the command of Professor Hartman, but an asteroid collides and explodes Capella.
Wealthy rancher G.W. McLintock uses his power to maintain peace between farmers, ranchers, land-grabbers, Indians, and corrupt officials in the territory.