Treaty of Kerden was signed between Ottoman Empire

Ottoman Empire

The Ottoman EmpireIt was usually referred to as the "Ottoman Empire", the "Turkish Empire", the "Ottoman Caliphate" or more commonly "Turkey" by its contemporaries...

 and Afsharid Iran on the 4th of September, 1746.

Background

During the last years of Safavid dynasty

Safavid dynasty

The Safavid dynasty was one of the most significant ruling dynasties of Iran. They ruled one of the greatest Persian empires since the Muslim conquest of Persia and established the Twelver school of Shi'a Islam as the official religion of their empire, marking one of the most important turning...

 in Iran, Ottomans were able to annex most of Caucasus

Caucasus

The Caucasus, also Caucas or Caucasia , is a geopolitical region at the border of Europe and Asia, and situated between the Black and the Caspian sea...

 and west Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

. Meanwhile, Afghans were able to annex a part of Khorasan

Greater Khorasan

Greater Khorasan or Ancient Khorasan is a historical region of Greater Iran mentioned in sources from Sassanid and Islamic eras which "frequently" had a denotation wider than current three provinces of Khorasan in Iran...

. The shah

Shah

Shāh is the title of the ruler of certain Southwest Asian and Central Asian countries, especially Persia , and derives from the Persian word shah, meaning "king".-History:...

 had to appoint Nadir, a Afshar Turkmen warlord as his commander in chief. Under Nadir’s commandship Iran was able to regain most of her losses. After the victories, it was an easy matter for Nadir to seize the throne. In 1736 Nadir Shah founded the Afsharid dynasty

Afsharid dynasty

The Afsharids were members of an Iranian dynasty of Turkmen origin from Khorasan who ruled Persia in the 18th century. The dynasty was founded in 1736 by the military commander Nader Shah who deposed the last member of the Safavid dynasty and proclaimed himself King of Iran. During Nader's reign,...

 (to be continued up to 1796.)
Nadir Shah was planning to found an empire. After reconquering former territorries of Iran, he further tried to annex the eastern territorries of the Ottoman empire (East Anatolia

Anatolia

Anatolia is a geographic and historical term denoting the westernmost protrusion of Asia, comprising the majority of the Republic of Turkey...

 and Iraq

Iraq

Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

) . But his operations in Ottoman lands (1743-1746) were mostly fruitless and he decided to end hostalities in Ottoman lands. He also proposed to reconcile the two sects (mazhab) of Islam

Islam

Islam . The most common are and .   : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~...

. (Ottomans were of Sunni faith and most of Iranians were of Shia faith.) He planned to force Ottomans, then the champion of Sunnis to accept Shia as a fifth legal sect

Islamic schools and branches

Muslims are basically divided in two major factions, Sunnis and Shias, that are further divided into various Schools of Jurisprudence and orders of Imamate. All other movements within such as Salafi, Modernists, the Mystical Sufi Orders, Deobandi and Barelvi are either Sunni or Shia or both...

 of Islam.

The terms of the treaty

The treaty was signed in Kerden (a location near Qazwin,Iran). The representatives were Hasan Ali Haji (Safavid side) and Mustafa Nazif (Ottoman side)

1. The boundary line between the two countries was the same boundary line drawn roughly a century ago by the treaty of Zuhab
   Treaty of Zuhab
   The Treaty of Zuhab was an accord signed between Safavid Empire and the Ottoman Empire on May 17, 1639. The accord ended the war that had begun in 1623 and was the last conflict in almost 150 years of intermittent wars between the two states over territorial disputes...
   
    of 1639. (i.e., modern Turkey
   Turkey
   Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...
   
   -Iran and Iraq-Iran boarder lines.)
2. The Ottomans agreed to legitimise the Afsaharid dynasty as the rulers of Iran.
3. The Ottomans also agreed to allow the Iranian haji
   Hajji
   Hajji or El-Hajj, is an honorific title given to a Muslim person who has successfully completed the Hajj to Mecca, and is often used to refer to an elder, since it can take time to accumulate the wealth to fund the travel. The title is placed before a person's name...
   
   s (pilgrims) to Mecca
   Mecca
   Mecca is a city in the Hijaz and the capital of Makkah province in Saudi Arabia. The city is located inland from Jeddah in a narrow valley at a height of above sea level...
   
   (then under Ottoman control)
4. Exchange of consulates were permitted in both countries.
5. Both sides agreed to liberate the prisoners of war.
6. Iran abandoned to force the Ottomans to decleare Shia as the fifth legal sect of Islam