Objectives to conquer a planet by an alien invasion

1. Destroy the entire earth's satellites system (outcome: takes out all of earth's communications)
2. Destroy the capitol cities of all of the most powerful nations on the target planet (outcome: takes out the leadership of the planet's masses, causing wandering sheep with no direction)
3. Destroy all the main hubs of the internet (outcome: takes out the planet's biggest technological power and achievement)
4. Unleash a super virus/disease, upon heavily populated areas from above (outcome: starts a super plague that will eventually engulf the planet and kill all life in it)
5. Continue destroying more cities, until the planet is finally under your control
6. Once the planet is cleared of all its inhabitants, the colonizing can begin
7. In case of the planet's inhabitants retaliate and fight back, all of the alien forces should contain indestructible force fields