History of IranThe history of Iran is intertwined with the history of a larger region known as Greater Iran, comprising the area from Anatolia in the west to the Indus river and the Syr Darya in the east, and from the Caucasus and the Eurasian Steppe in the north to the Persian Gulf and the Gulf of Oman in the south. Central to this area is Iran, commonly known until the mid-20th century as Persia in the Western world. Iran is home to one of the world's oldest continuous major civilizations, with historical and urban settlements dating back to 4000 BC.
TajikistanTajikistan, officially the Republic of Tajikistan, is a landlocked country in Central Asia. It has an area of and an estimated population of 9,750,065 people. Dushanbe is the country's capital and largest city. It is bordered by Afghanistan to the south, Uzbekistan to the west, Kyrgyzstan to the north, China to the east and is separated narrowly from Pakistan by Afghanistan's Wakhan Corridor. Tajiks form the ethnic majority in the country and the historical Tajik homeland lies in present-day Tajikistan as well as parts of Afghanistan and Uzbekistan.
Persian languagePersian (ˈpɜrʒən or ˈpɜrʃən ), also known by its endonym Farsi (فارسی, , fɒːɾˈsiː), is a Western Iranian language belonging to the Iranian branch of the Indo-Iranian subdivision of the Indo-European languages. Persian is a pluricentric language predominantly spoken and used officially within Iran, Afghanistan, and Tajikistan in three mutually intelligible standard varieties, namely Iranian Persian (officially known as Persian), Dari Persian (officially known as Dari since 1964) and Tajiki Persian (officially known as Tajik since 1999).
