All Out American Fight

1. united states 

VS.

1. all nations on earth

russia, china, european union, japan, brazil, and india are nuclear superpowers 

2. atlantis (1000 times more advanced than humans)

3. lemuria (1000 times more advanced than humans)

4. agarthans (1000 times more advanced than humans)

5. martians (1000 times more advanced than humans)

6. pacific rim kaiju race

7. asteroid terrorism

8. autocons and deceptions 

9. skynet 

10. entire galactic empire (type 3 race, billions of worlds united)

11. entire armies of heaven and hell

12. the harvesters (first wave)

Results: the united states emerges the victor in the end, but at the cost of 99.99% of america obliterated and beyond repair