Date of formation of the Persian state?

The history of the Persian state begins in 646 BC, when Cyrus 1 ruled. One part of the Persians was engaged in agriculture, and the other led a nomadic lifestyle. During the reign of Cyrus 2 in 553 BC. there was a rebellion against Media, in the end she was subdued. The capital of Media turned into the residence of Cyrus 2. The formation of the Persian state took place. Further, the Persians conquered Elam, Parthia, Armenia, Hyrcania, Lydia. These countries began to pay tribute to the Persians. In 539 BC. the Persians managed to subdue the mighty Babylon.