Land of the Sky

The is featured in Naruto Shippūden 2: Bonds. The country was formed by ninja from several countries that could mold their chakra to mist in order to fly. It is said that they fought in the Second Great Shinobi World War. Their hidden village was destroyed in the war by Konohagakure but the country survived. Shinnō is from this village. They apparently have quite the reputation as Tsunade was terrified that they were attacking Konohagakure. They use fliers that use chakra to operate. Their base is a giant temple named Ancor Vantian which means "The Ultimate Weapon", which is capable of flight and possesses a powerful laser-like weapon at the front.

The base was powered by the Zero-Tailed Masked Leech, and allowed the city to take flight. Upon Shinnō's defeat at the hands of Naruto Uzumaki and Sasuke Uchiha, the Zero-Tailed Masked Leech went berserk and devoured all the sky ninjas aboard the temple and caused it to explode and collapse.

Trivia

 * The name Ancor Vantian is derived from temple Angkor Wat settled in Cambodia.