Turkmenistan in the context of Ophrys

Iran, officially the Islamic Republic of Iran and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the northeast, Afghanistan to the east, Pakistan to the southeast, and the Gulf of Oman and the Persian Gulf to the south. With a population of over 90 million, Iran ranks 17th globally in both geographic size and population and is the sixth-largest country in Asia. Iran is divided into five regions with 31 provinces. Tehran is the nation's capital, largest city, and financial center.

Home to one of the world's oldest continuous major civilizations, most of Iran was first united as a nation by the Medes under Cyaxares in the 7th century BC and reached its territorial height in the 6th century BC, when Cyrus the Great founded the Achaemenid Empire. Alexander the Great conquered the empire in the 4th century BC. An Iranian rebellion in the 3rd century BC established the Parthian Empire, which later liberated the country. In the 3rd century CE, the Parthians were succeeded by the Sasanian Empire, who oversaw a golden age in the history of Iranian civilization. During this period, ancient Iran saw some of the earliest developments of writing, agriculture, urbanization, religion, and administration. Once a center for Zoroastrianism, the 7th century CE Muslim conquest brought about the Islamization of Iran. Innovations in literature, philosophy, mathematics, medicine, astronomy and art were renewed during the Islamic Golden Age and Iranian Intermezzo, a period during which Iranian Muslim dynasties ended Arab rule and revived the Persian language. This era was followed by Seljuk and Khwarazmian rule, Mongol conquests and the Timurid Renaissance from the 11th to 14th centuries.

Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central and South Asia. It is bordered by Pakistan to the east and south, Iran to the west, Turkmenistan to the northwest, Uzbekistan to the north, Tajikistan to the northeast, and China to the northeast and east. Occupying 652,864 square kilometers (252,072 sq mi) of land, the country is predominantly mountainous with plains in the north and the southwest, which are separated by the Hindu Kush mountain range. Kabul is the country's capital and largest city. Afghanistan's population is estimated to be between 40 and 50 million.

Human habitation in Afghanistan dates to the Middle Paleolithic era. Popularly referred to as the graveyard of empires, the land has witnessed numerous military campaigns, including those by the Persians, Alexander the Great, the Maurya Empire, Arab Muslims, the Mongols, the British, the Soviet Union, and a US-led coalition. Afghanistan also served as the source from which the Greco-Bactrians and the Mughals, among others, rose to form major empires. Because of the various conquests and periods in both the Iranian and Indian cultural spheres, the area was a center for Zoroastrianism, Buddhism, Hinduism, and later Islam. The modern state of Afghanistan began with the Durrani Afghan Empire in the 18th century, although Dost Mohammad Khan is sometimes considered to be the founder of the first modern Afghan state. Afghanistan became a buffer state in the Great Game between the British Empire and the Russian Empire. From India, the British attempted to subjugate Afghanistan but were repelled in the First Anglo-Afghan War; the Second Anglo-Afghan War saw a British victory. Following the Third Anglo-Afghan War in 1919, Afghanistan became free of foreign political hegemony, and emerged as the independent Kingdom of Afghanistan in 1926. This monarchy lasted almost half a century, until Zahir Shah was overthrown in 1973, following which the Republic of Afghanistan was established.

The Seleucid Empire (/sɪˈljuːsɪd/ sih-LEW-sid) was a Greek state in West Asia during the Hellenistic period. It was founded in 312 BC by the Macedonian general Seleucus I Nicator, following the division of the Macedonian Empire founded by Alexander the Great, and ruled by the Seleucid dynasty until its annexation by the Roman Republic under Pompey in 63 BC.

After receiving the Mesopotamian regions of Babylonia and Assyria in 321 BC, Seleucus I began expanding his dominions to include the Near Eastern territories that encompass modern-day Iraq, Iran, Afghanistan, Syria, and Lebanon, all of which had been under Macedonian control after the fall of the former Achaemenid Empire. At the Seleucid Empire's height, it had consisted of territory that covered Anatolia, Persia, the Levant, Mesopotamia, and what are now modern Kuwait, Afghanistan, and parts of Turkmenistan.

The Greco-Bactrian Kingdom (Greek: Βασιλεία τῆς Βακτριανῆς, romanized: Basileía tês Baktrianês, lit. 'Kingdom of Bactria') was a Greek kingdom during the Hellenistic period located in Central Asia and Afghanistan. The kingdom was founded by the Seleucid satrap Diodotus I Soter in about 256 BC, and continued to dominate Central Asia until its fall around 120 BC. At its peak the kingdom consisted of present-day Afghanistan, Tajikistan, Uzbekistan and Turkmenistan, and for a short time, small parts of Kazakhstan, Pakistan, India and Iran. An extension further east, with military campaigns and settlements, may have reached the borders of the Qin State in China by about 230 BC.

A Greek population was already present in Bactria by the 5th century BC. Alexander the Great had conquered the region by 327 BC, founding many cities, most of them named Alexandria, and further settling Macedonians and other Greeks. After the death of Alexander, control of Bactria passed on to his general Seleucus I Nicator. The fertility and the prosperity of the region led to the creation of the Greco-Bactrian kingdom under Diodotus by the early 3rd century BC, as a successor state of the Seleucid Empire. The Bactrian Greeks grew increasingly more powerful and invaded north-western India between 190 and 180 BC under king Demetrius, the son of Euthydemus. This invasion led to the creation of the Indo-Greek kingdom, which in turn was a successor to the Greco-Bactrian kingdom, and was subsequently ruled by the kings Pantaleon and Apollodotus I. Historical records indicate that many rich and prosperous cities were present in the kingdom, but only a few of them have been excavated, such as Ai-Khanoum and Bactra. The city of Ai-Khanoum, in north-eastern Afghanistan, had all the hallmarks of a true Hellenistic city with a Greek theater, gymnasium and some houses with colonnaded courtyards.

The Caspian Sea is the world's largest inland body of water, described as the world's largest lake and usually referred to as a full-fledged sea. An endorheic basin, it is situated in both Europe and Asia: east of the Caucasus, west of the broad steppe of Central Asia, south of the fertile plains of Southern Russia in Eastern Europe, and north of the mountainous Iranian Plateau. It covers a surface area of 371,000 km (143,000 sq mi) (excluding the highly saline lagoon of Garabogazköl to its east), an area approximately equal to that of Japan, with a volume of 78,200 km (19,000 cu mi). It has a salinity of approximately 1.2% (12 g/L), about a third of the salinity of average seawater. It is bounded by Kazakhstan to the northeast, Russia to the northwest, Azerbaijan to the southwest, Iran to the south, and Turkmenistan to the southeast. The name of the Caspian Sea is derived from the ancient Iranic Caspi people.

The lake stretches 1,200 km (750 mi) from north to south, with an average width of 320 km (200 mi). Its gross coverage is 386,400 km (149,200 sq mi) and the surface is about 27 m (89 ft) below sea level. Its main freshwater inflow, Europe's longest river, the Volga, enters at the shallow north end. Two deep basins form its central and southern zones. These lead to horizontal differences in temperature, salinity, and ecology. The seabed in the south reaches 1,023 m (3,356 ft) below sea level, which is the third-lowest natural non-oceanic depression on Earth after Baikal and Tanganyika lakes.

Central Asia is a region of Asia consisting of Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan. The countries as a group are also colloquially referred to as the "-stans" as all have names ending with the Persian suffix "-stan" (meaning 'land') in both respective native languages and most other languages. The region is bounded by the Caspian Sea to the southwest, European Russia to the northwest, China and Mongolia to the east, Afghanistan and Iran to the south, and Siberia to the north. Together, the five Central Asian countries have a total population of around 76 million.

In the pre-Islamic and early Islamic eras (c. 1000 and earlier) Central Asia was inhabited predominantly by Iranian peoples, populated by Eastern Iranian-speaking Bactrians, Sogdians, Chorasmians, and the semi-nomadic Scythians and Dahae. As the result of Turkic migration, Central Asia also became the homeland for the Kazakhs, Kyrgyzs, Tatars, Turkmens, Uyghurs, and Uzbeks; Turkic languages largely replaced the Iranian languages spoken in the area, with the exception of Tajikistan and areas where Tajik is spoken.

Eurasian nomads form groups of nomadic peoples who have lived in various areas of the Eurasian Steppe. History largely knows them via frontier historical sources from Europe and Asia.

The steppe nomads had no permanent abode, but travelled from place to place to find fresh pasture for their livestock. The generic designation encompasses the varied ethnic groups who have at times inhabited steppe regions of present-day Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan, Uyghuristan, Mongolia, Russia, and Ukraine.

A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as a reef, a barrier island or islands, a barrier peninsula, or an isthmus. Lagoons are commonly divided into coastal lagoons (or barrier lagoons) and atoll lagoons. They have also been identified as occurring on mixed-sand and gravel coastlines. There is an overlap between bodies of water classified as coastal lagoons and bodies of water classified as estuaries. Lagoons are common coastal features around many parts of the world.

Turkoman, also known as Turcoman (English: /ˈtɜːrkəmən/), was a term for the people of Oghuz Turkic origin, widely used during the Middle Ages. Oghuz Turks were a western Turkic people that, in the 8th century A.D, formed a tribal confederation in an area between the Aral and Caspian seas in Central Asia, and spoke the Oghuz branch of the Turkic language family. Today, much of the populations of Turkey, Azerbaijan and Turkmenistan are direct descendants of Oghuz Turks once called Turkomans.

Turkmen, originally an exonym, dates from the High Middle Ages, along with the ancient and familiar name "Turk" (türk), and tribal names such as "Bayat", "Bayandur", "Afshar", and "Kayi". By the 10th century, Islamic sources were referring to Oghuz Turks as Muslim Turkmens, as opposed to Tengrist or Buddhist Turks. It entered into the usage of the Western world through the Byzantines in the 12th century, since by that time Oghuz Turks were overwhelmingly Muslim. Later, the term "Oghuz" was gradually supplanted by "Turkmen" among Oghuz Turks themselves, thus turning an exonym into an endonym, a process which was completed by the beginning of the 13th century.

Uzbekistan, officially the Republic of Uzbekistan, is a doubly landlocked country located in Central Asia. It is surrounded by five countries: Kazakhstan to the north, Kyrgyzstan to the northeast, Tajikistan to the southeast, Afghanistan to the south, and Turkmenistan to the southwest, making it one of only two doubly landlocked countries on Earth, the other being Liechtenstein. The country has a population of more than 37.6 million, making it the most populous country in Central Asia. Uzbekistan is a member of the Organization of Turkic States. Uzbek, spoken by the Uzbek people, is the official language and spoken by the majority of its inhabitants, while Russian and Tajik are significant minority languages. Islam is the predominant religion, and most Uzbeks are Sunni Muslims.

The first recorded settlers in the land of what is contemporary Uzbekistan were Eastern Iranian nomads, known as Scythians, who founded kingdoms in Khwarazm, Sogdiana, and Bactria in the 8th–6th centuries BC, as well as Fergana and Margiana in the 3rd century BC – 6th century AD. The area was incorporated into the Achaemenid Empire and, after a period of Greco-Bactrian rule and later by the Sasanian Empire, until the Muslim conquest of Persia in the seventh century. The early Muslim conquests and the subsequent Samanid Empire converted most of the people into adherents of Islam. During this period, cities began to grow rich from the Silk Road, and became a center of the Islamic Golden Age. The local Khwarazmian dynasty was destroyed by the Mongol invasion in the 13th century, leading to a dominance by Mongol peoples. Timur in the 14th century established the Timurid Empire. Its capital was Samarkand, which became a center of science under the rule of Ulugh Beg, giving birth to the Timurid Renaissance. The territories of the Timurid dynasty were conquered by Kipchak Shaybanids in the 16th century. Conquests by Emperor Babur towards the east led to the foundation of the Mughal Empire in India. Most of Central Asia was gradually incorporated into the Russian Empire during the 19th century, with Tashkent becoming the political center of Russian Turkestan. In 1924, national delimitation created the Uzbek Soviet Socialist Republic as a republic of the Soviet Union. It declared independence as the Republic of Uzbekistan in 1991.

Kazakhstan, officially the Republic of Kazakhstan, is a landlocked country primarily in Central Asia, with a small portion in Eastern Europe. It borders Russia to the north and west, China to the east, Kyrgyzstan to the southeast, Uzbekistan to the south, and Turkmenistan to the southwest, with a coastline along the Caspian Sea. Its capital is Astana, while the largest city and leading cultural and commercial hub is Almaty (which had been the capital city until 1997).

Kazakhstan is the world's ninth-largest country by land area and the largest landlocked country. Hilly plateaus and plains account for nearly half its vast territory, with lowlands composing another third; its southern and eastern frontiers are composed of mountainous regions. Kazakhstan has a population of 20 million and one of the lowest population densities in the world, with fewer than 6 people per square kilometre (16 people/sq mi). Ethnic Kazakhs constitute a majority, while ethnic Russians form a significant minority. Officially secular, Kazakhstan is a Muslim-majority country with a sizeable Christian community.

The composite Turko-Persian, Turco-Persian, or Turco-Iranian (Persian: فرهنگ ایرانی-ترکی) is the distinctive culture that arose in the 9th and 10th centuries AD in Khorasan and Transoxiana (present-day Afghanistan, Iran, Uzbekistan, Turkmenistan, Tajikistan and minor parts of Kyrgyzstan and Kazakhstan). According to the modern historian Robert L. Canfield, the Turco-Persian tradition was Persianate in that it was centered on a lettered tradition of Iranian origin; it was Turkic in so far as it was for many generations patronized by Turkic rulers; and it was "Islamicate" in that Islamic notions of virtue, permanence, and excellence infused discourse about public issues as well as the religious affairs of the Muslims, who were the presiding elite."

In subsequent centuries, the Turco-Persian culture was carried on further by conquering peoples to neighbouring regions, eventually becoming the predominant culture of the ruling and elite classes of South Asia (where it evolved into Indo-Persian tradition), Central Asia and the Tarim Basin, as well as large parts of West Asia.

The post-Soviet states, also referred to as the former Soviet Union or the former Soviet republics, are the independent sovereign states that emerged/re-emerged from the dissolution of the Soviet Union in 1991. Prior to their independence, they existed as Union Republics, which were the top-level constituents of the Soviet Union. There are 15 post-Soviet states in total: Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan. Each of these countries succeeded their respective Union Republics: the Armenian SSR, the Azerbaijan SSR, the Byelorussian SSR, the Estonian SSR, the Georgian SSR, the Kazakh SSR, the Kirghiz SSR, the Latvian SSR, the Lithuanian SSR, the Moldavian SSR, the Russian SFSR, the Tajik SSR, the Turkmen SSR, the Ukrainian SSR, and the Uzbek SSR. In Russia, the term "near abroad" (Russian: ближнее зарубежье, romanized: bližneye zarubežye) is sometimes used to refer to the post-Soviet states other than Russia.

Following the transition period and cessation of the existence of the Soviet Union, post-Soviet states and the international community de facto and de jure recognized Russia as the only continuator state to the Soviet Union as a whole, rather than to just the Russian SFSR including UN and UNSC membership (see agreements in Succession, continuity and legacy of the Soviet Union). The other post-Soviet states were recognized as successors only to their corresponding Union Republics and to international treaties concluded by the Soviet Union. All 12 post-Soviet states are successors of the Soviet Union, but not continuators.

The Oghuz Turks (Middle Turkic: ٱغُز, romanized: Oγuz) were a western Turkic people who spoke the Oghuz branch of the Turkic language family. In the 8th century, they formed a tribal confederation conventionally named the Oghuz Yabgu State in Central Asia. Today, much of the populations of Turkey, Azerbaijan and Turkmenistan are descendants of Oghuz Turks. The term Oghuz was gradually supplanted by the terms Turkmen and Turcoman (Ottoman Turkish: تركمن, romanized: Türkmen or Türkmân) by the 13th century.

The Oghuz confederation migrated westward from the Jeti-su area after a conflict with the Karluk allies of the Uyghurs. In the 9th century, the Oghuz from the Aral steppes drove Pechenegs westward from the Emba and Ural River region. In the 10th century, the Oghuz inhabited the steppe of the rivers Sari-su, Turgai and Emba north of Lake Balkhash in modern-day Kazakhstan.

The Parthian language, also known as Arsacid Pahlavi and Pahlawānīg, is an extinct ancient Northwestern Iranian language once spoken in Parthia, a region situated in present-day northeastern Iran and Turkmenistan. Parthian was the language of state of the Arsacid Parthian Empire (248 BC – 224 AD), as well as of its eponymous branches of the Arsacid dynasty of Armenia, Arsacid dynasty of Iberia, and the Arsacid dynasty of Caucasian Albania.

Parthian had a significant impact on Armenian, a large part of whose vocabulary was formed primarily from borrowings from Parthian, and had a derivational morphology and syntax that was also affected by language contact but to a lesser extent. Many ancient Parthian words were preserved and now survive only in Armenian. The Semnani or Komisenian languages and Zaza language have similarities with Parthian language and they may descend from Parthian directly or Northwestern Iranian languages with Parthian influences, but the topic lacks sufficient research.

The Ilkhanate or Il-khanate was a Mongol khanate founded in the southwestern territories of the Mongol Empire. It was ruled by the Il-Khans or Ilkhanids (Persian: ایلخانان, romanized: Īlkhānān), and known to the Mongols as Hülegü Ulus (lit. 'people / state of Hülegü'). The Ilkhanid realm was officially known as the Land of Iran or simply Iran. It was established after Hülegü, the son of Tolui and grandson of Genghis Khan, inherited the West Asian and Central Asian part of the Mongol Empire after his brother Möngke Khan died in 1259.

The Ilkhanate's core territory was situated in what is now the countries of Iran, Azerbaijan, and Turkey. At its greatest extent, the Ilkhanate also included parts of modern Iraq, Syria, Armenia, Georgia, Afghanistan, Turkmenistan, Pakistan, Tajikistan, and Dagestan (Russia). Later Ilkhanid rulers, beginning with Ghazan in 1295, converted to Islam. In the 1330s, the Ilkhanate was ravaged by the Black Death. The last ilkhan, Abu Sa'id Bahadur Khan, died in 1335, after which the Ilkhanate disintegrated.

The Mongol invasions and conquests took place during the 13th and 14th centuries, creating the largest contiguous empire in history, the Mongol Empire (1206–1368), which by 1260 covered a significant portion of Eurasia. Historians regard the Mongol devastation as one of the deadliest episodes in history.

At its height, the Mongol Empire included modern-day Mongolia, China, North Korea, South Korea, Myanmar, Iran, Iraq, Afghanistan, Pakistan, Kashmir, Kazakhstan, Tajikistan, Kyrgyzstan, Turkmenistan, Uzbekistan, Siberia, Georgia, Armenia, Azerbaijan, Turkey, Belarus, Ukraine, Moldova, Romania, and most of European Russia.

The Afghanistan–Iran border is 921 km (572 mi) in length and runs from the tripoint with Turkmenistan in the north to the tripoint with Pakistan in the south.