Battle of Manzikert in the context of "Romanos IV Diogenes"

The Sultanate of Rum, or Seljuk Empire of Rum, was a culturally Turco-Persian Sunni Muslim state, established over conquered Byzantine territories and peoples (Rum) of Anatolia by the Seljuk Turks following their entry into Anatolia after the Battle of Manzikert in 1071. The name Rum was a synonym for the medieval Eastern Roman Empire and its peoples, as it remains in modern Turkish. The name is derived from the Aramaic (romī) and Parthian (frwm) names for ancient Rome, via the Greek Ῥωμαῖοι (Romaioi) meaning Anatolia. It is considered to be the beginning of Turkish history in Anatolia.

The Sultanate of Rum seceded from the Seljuk Empire under Suleiman ibn Qutalmish in 1077. It had its capital first at Nicaea and then at Iconium. It reached the height of its power during the late 12th and early 13th century, when it succeeded in taking key Byzantine ports on the Mediterranean and Black Sea coasts. In the east, the sultanate reached Lake Van. Trade through Anatolia from Iran and Central Asia was developed by a system of caravanserai. Especially strong trade ties with the Genoese formed during this period. The increased wealth allowed the sultanate to absorb other Turkish states that had been established following the conquest of Byzantine Anatolia: Danishmendids, House of Mengüjek, Saltukids, Artuqids.

The House of Mengüjek (Modern Turkish: Mengüçoğulları, Mengücek Beyliği or Mengüçlü Beyliği; the reigning dynasty is known as Mengujekids or Menkujakids) was a Turkish Anatolian beylik (principality) of the first period, founded after the Battle of Manzikert. The Mengujekids ruled the regions of Erzincan, Kemah, Şebinkarahisar and Divriği in Eastern Anatolia in the 12th and 13th centuries.

The Saltukids or Saltuqids (Modern Turkish: Saltuklu Beyliği) were a dynasty of the Seljuk Empire, founded after the Battle of Manzikert (1071) centred on Erzurum. The Saltukids ruled between 1071 and 1202. The beylik was founded by Emir Saltuk, one of the Turkmen commanders of the Great Seljuk Alp Arslan. The beylik fought frequently against the Georgian Kingdom for hegemony of the Kars region. The center of the beylik, Erzurum, was briefly re-occupied by the Byzantine Empire between 1077 and 1079, and was besieged by the Georgian King Giorgi III in 1184. It comprised the entirety of present-day Erzurum and Bayburt provinces, lands east of Erzincan, most of Kars, and lands north of Ağrı and Muş provinces during its height.

The Byzantine army was the primary military body of the Byzantine armed forces, serving alongside the Byzantine navy. A direct continuation of the Eastern Roman army, shaping and developing itself on the legacy of the late Hellenistic armies, it maintained a similar level of discipline, strategic prowess and organization. It was among the most effective armies of western Eurasia for much of the Middle Ages. Over time the cavalry arm became more prominent in the Byzantine army as the legion system disappeared in the early 7th century. Later reforms reflected some Germanic and Asian influences—rival forces frequently became sources of mercenary units, such as the Huns, Cumans, Alans and (following the Battle of Manzikert) Turks, meeting the Empire's demand for light cavalry mercenaries. Since much of the Byzantine military focused on the strategy and skill of generals utilizing militia troops, heavy infantry were recruited from Frankish and later Varangian mercenaries.

From the 6th to the 12th centuries, the Byzantine army was among the most powerful and effective military forces in the world – neither Middle Ages Europe nor (following its early successes) the fracturing Caliphate could match the strategies and the efficiency of the Byzantine army. Restricted to a largely defensive role in the 7th to mid-9th centuries, the Byzantines developed the theme system to counter the more powerful Caliphate. From the mid-9th century, however, they gradually went on the offensive, culminating in the great conquests of the 10th century under a series of soldier-emperors such as Nikephoros II Phokas, John Tzimiskes and Basil II. The army they led was less reliant on the militia of the themes; it was by now a largely professional force, with a strong and well-drilled infantry at its core and augmented by a revived heavy cavalry arm. With one of the most powerful economies in the world at the time, the Empire had the resources to put to the field a powerful host when needed, in order to reclaim its long-lost territories.

Caesarea (/ˌsɛzəˈriːə, ˌsɛsəˈriːə, ˌsiːzəˈriːə/; Greek: Καισάρεια, romanized: Kaisareia), also known historically as Mazaca or Mazaka (Greek: Μάζακα, Armenian: Մաժաք), was an ancient city in what is now Kayseri, Turkey. In Hellenistic and Roman times, the city was an important stop for merchants headed to Europe on the ancient Silk Road. The city was the capital of Cappadocia, and Armenian and Cappadocian kings regularly fought over control of the strategic city. The city was renowned for its bishops of both the Greek Orthodox and Armenian Apostolic churches.

After the Battle of Manzikert where the Byzantine Empire lost to the incoming Seljuk Empire, the city was later taken over by the Sultanate of Rum and became reconfigured over time with the influences of both Islamic and, later, Ottoman architecture.

The Turkish population refers to the number of ethnic Turkish people in the world. During the Seljuk (1037–1194) and Ottoman (1299–1923) eras, ethnic Turks were settled across the lands conquered by the two empires. In particular, the Turkification of Anatolia (modern Turkey) was the result of the Battle of Manzikert in 1071 and the formation of the Sultanate of Rum. Thereafter, the Ottomans continued Turkish expansion throughout the regions around the Black Sea and the Mediterranean Sea. Consequently, today the Turkish people form a majority in Turkey and Northern Cyprus. There are also significant Turkish minorities who still live in the Balkans, the Caucasus, the Middle East and the Levant, and North Africa.

More recently, the Turkish people have emigrated from their traditional areas of settlement for various reasons, forming a large diaspora. From the mid-twentieth century onwards, unskilled workers from Turkey settled mainly in German and French speaking countries of Western Europe, in contrast, a "brain drain" of skilled workers from Turkey migrated mostly to North America. Moreover, ethnic Turks from other traditional areas of Turkish settlement have emigrated mostly due to political reasons. For example, the Meskhetian Turks were deported to Central Asia from Georgia in 1944; Turkish Cypriots have emigrated mostly as refugees to the English-speaking world during the Cyprus conflict and its immediate aftermath; Cretan Turks have significant populations in the Arab world as a result of being expelled from Greece; etc..

The Uprising of Georgi Voyteh (Bulgarian: Въстание на Георги Войтех, romanized: Vastanie na Georgi Voyteh), or the Slavic uprising against the Byzantine rule (Serbian: Словенски устанак против византијске власти, romanized: Slovenski ustanak protiv vizantijske vlasti) was a wide South Slavic uprising against the Byzantine rule, that broke out in central Balkan regions soon after the devastating Byzantine defeat in Asia Minor, at the Battle of Manzikert (1071). The movement was initiated by Bulgarian leaders in the theme of Bulgaria, with assistance from the Serbian prince Michael I of Duklja, whose son Bodin was accepted by the rebels and proclaimed as emperor of Bulgaria, under the name Peter (1072). After some initial expansion, and several clashes with the Byzantines, the rebels were defeated by 1073. That was the second major attempt to restore the Bulgarian Empire, after the failed Uprising of Peter Delyan in 1040–1041.

The territorial evolution of the Ottoman Empire spans seven centuries.

The origins of the Ottomans can be traced back to the late 11th century when a few small Muslim emirates of Turkic origins and nomadic nature—called Beyliks—started to be found in different parts of Anatolia. Their main role was to defend Seljuk border areas with the Byzantine Empire —a role reinforced by the migration of many Turks to Asia Minor. However, in 1071 and following the victory of the Sultanate of Rum over the Byzantines at the Battle of Manzikert, Beyliks sought an opportunity to override the Seljuk authority and declare their own sovereignty openly.