We have done this once before. You have one post and only one post. There is no changing the circumstances, just write how your character would react to it. Do not God-mod my RPG! You cannot effect the idea of the post, you cannot change the world no matter how powerful your character is......Just write you reaction.
The sun was rising on the East coast when it hit...or landed...whatever it was. They had come in a massive force and had moved through the world with a lighting fast speed. The whole of the world was their's in just moments as they passed through the world's military in just moments, one attack world wide all at once. The Overlords had quickly took over the media and were broadcasting their message in all languages all at once. "We are now your lord's and you will submit to the rule of the Overlords. Any resistance will lead to the death of 1 million people. You will be tagged and will be assigned jobs based on your abilities."