Probably USA again but it won't be decisive. It will be counted as very big crash for human history so even winners will not gain that much of a thing. Wait and see.
First of all, we need to know which are the sides taking part in the World War III. It can be between the US and China, it can be US vs Russia, it can be US vs DPRK and so on. The Americans might be able to defeat weaker nations such as Iran and DPRK. But against China and Russia, I am not sure whether they will be able to achieve a conclusive victory.
Dude, do you really want to know how much military arsenal own USA unlike the other countries..?
1) United States
USAF
The F-22 and F-35 flying together.
Budget: $601 billion
Active frontline personnel: 1,400,000
Tanks: 8,848
Total aircraft: 13,892
Submarines: 72
Despite sequestration and other spending cuts, the United States spends more money — $601 billion — on defense than the next nine countries on Credit Suisse's index combined.
America's biggest conventional military advantage is its fleet of 10 aircraft carriers. In comparison India, which is constructing its third carrier, has the second-most carriers in the world.
The US also has by far the most aircraft of any country, cutting-edge technology like the Navy's new rail gun, a large and well-trained human force — and that's not even counting the world's largest nuclear arsenal.
2) Russia
REUTERS/Baz Ratner
Russian soldiers ride on military armored personnel carriers on a road near the Crimean port city of Sevastopol March 10, 2014.
Budget: $84.5 billion
Active frontline personnel: 766,055
Tanks: 15,398
Total aircraft: 3,429
Submarines: 55
USA can be in war with top 4 countries and still destroy them!
US aircraft carriers might be obsolete.
https://en.wikipedia.org/wiki/DF-21
