Iranian Azeris

The Iranian Azeris (Azeri: ایران آذربایجانلیلاری; Persian: ایرانیان آذربایجان), also known as Iranian Azerbaijanis or Persian Azeris, are Iranians of full or partial Azeri descent. Iranian Azeris are a Turkic-speaking people they are mainly descended from the earlier Iranians of the region. The mother tongue of most Iranian Azeris is Azeri language. Azeri language is a Turkic language learned and spoken by Iranian peasants. 
History.
Ancient age.
In the Achaemenid period Azerbaijan was part of the satrapy of Media. When the Achaemenid empire collapsed, Atropates, the Persian satrap of Media, made himself independent in the northwest of this region in 321 B.C. Thereafter Greek and Latin writers named the territory Media Atropatene or, less frequently, Media Minor. The Middle Persian form of the name was (early) Āturpātakān, (later) Ādurbādagān whence the New Persian Āḏarbāyjān.
Medieval age.
The Safavids, emerged in the Ardabil region of Iranian Azerbaijan and continued their existence until 1722/1736 by capturing all of Iranian Azerbaijan. The Safavids reasserted the Iranian identity of the region and established an independent Iranian state. It is estimated that the Safavid dynasty was partly or wholly of Kurdish origin. 
Later, Iranian Azerbaijan fell into the hands of Pahlavis in 1925. The Azerbaijan People's Government was founded in 1945 but was overthrown by the Pahlavis in 1946. 
With the 1979 Iranian Islamic revolution, Iranian Azerbaijan became a part of the Islamic Republic of Iran and has survived to the present day.