Every other country
Only voted this because when you really think about it, the USA owns most of the other countries anyways.
USA, USA, USA
The US spends the most amount of money in the world on its army, and its funding is more than the next three combined. Our army probably has more money and resources than others could imagine. It would be devastating, with serious MAD (Mutually Assured Destruction), but the US probably would win.
Seriously? Its everyone against one.
I saw my own flag in that image. How can I vote against that cute flag?
Of course the world.
Poll undoubtedly created by an American
I'm an american, and I created this poll.
The GDP of all other nations combined is much, much higher than the GDP of a single nation, in this case the US. The US is the top world economy currently but, if the nations manage to cooperate and strategize, the war will be over very quickly.
If the US took them one by one maybe, but all together no.