The second strongest country is still us. The US could divide into several pieces and split the hardware to rank 1-4 as world superpowers. Russia has plenty of nukes, but the rest of their military machine is a joke. Same for China, millions of soldiers, but no navy or air force, so unless they prepared to march across the earth and face air power with a mass of screaming men with bayonets, they're nowhere. Japan has some good weapons they bought from us, but no real capability to capture and hold land. France? BWAHAHA!!! Sure they have nukes, but they'd still find a way to surrender to a pack of cub scouts with a rusty BB gun. After us, us, us, and us, probably the best military on earth, nukes aside, would be Israel. They're the only country that combines modern air power with modern land weapons and a professional, well-trained army.