What is "hayasa-azzi"

Hayasa-Azzi or Azzi-Hayasa was a Late Bronze Age confederation formed between two kingdoms of Armenian Highlands, Hayasa located South of Trabzon and Azzi, located north of the Euphrates and to the south of Hayasa. The Hayasa-Azzi confederation was in conflict with the Hittite Empire in the 14th century BC, leading up to the collapse of Hatti around 1190 BC.