During the last years of the Safavid dynasty in Iran, Ottomans were able to annex most of Caucasus and west Iran, due to hereditary strife, civil unrest and total chaos.
The shah had to appoint Nadir, an Iranian Afshar Turkoman[1] warlord, as his commander in chief.
Under Nadir’s brilliant commandship, Iran was able to regain most of her losses.
Nadir Shah was planning to found another great Persian empire, stretching from the Indus to the Bosphorus, like in ancient times.
He planned to force the Ottoman Empire, the most powerful Sunni state, to accept Twelver Shia Islam as a fifth legal school of jurisprudence of Sunni Islam.