As a result of the Saxon immigration, the Székelys – Hungarian-speaking free warriors cultivating communal lands – were transferred to the southeast of the province.

From the 13th century they were governed independently from the voivode by a royal official, the count of the Székelys.

In 1562 many Székelys took up arms against John II Sigismund, but they were defeated.

They were called Székelys of Telegd and the first name of Székelyudvarhely which is the centre of the area they moved was Telegd.

The Vlachs were also employed as border guards in the southeastern frontiers of the Kingdom of Hungary along with the Pechenegs and Székelys.

The Székelys derive their name from a Hungarian expression meaning " frontier guards " and were regarded as the finest warriors of medieval Transylvania.

There is historical evidence that the Székelys were part of the Avar confederation during the so-called Dark Ages, but this does not mean that they were ethnically Avar.

* After the theory of Hunnic descent lost scholarly currency in the twentieth century, some scholars suggested that the Székelys were simply Magyars, like other Hungarians, transplanted in the Middle Ages to guard the frontiers.

The Saxons and Székelys living in the border area tried to defend themselves, but were heavily outnumbered by the intruders.

On this occasion, nobles set up an alliance with Székelys and Saxons who were still afraid of possible Otoman incursions.

The majority of the horse archers were conscripted from various ethnic groups, such as Székelys, Kipchaks, Jassic people and ( after Mohi ) Cumans from the poorest peripheric regions of the kingdom ( southern parts, the middle of the Great Hungarian Plain and eastern parts of Transylvania ).

The Székely Seats were the traditional self-governing territorial units of the Transylvanian Székelys during medieval times.

Then its name arose in 1278 as Zekulhyd and in 1325 as Zekulhyda whose meaning is bridge of Székely in Hungarian, and according to a legend, Székelys were settled down here to guard the bridge of Ér as early as the 10th century.

The city has a substantial ethnic Hungarian minority, some of whom identify as Székelys.

In post-Cold War Romania, where the Székelys form roughly a third of the ethnic Hungarian population, members of the group have been among the most vocal of Hungarians seeking an autonomous Hungarian region in Transylvania.

Some Hungarian people share the belief that the Székelys, a Hungarian ethnic group living in modern-day Transylvania, are descended from a group of Huns who remained in the Carpathian Basin after 454 ; this myth was recorded in the medieval Gesta Hungarorum.

The Székelys of Bukovina are a small Hungarian ethnic community with a complex history.

In Hungarian mythology, Csaba, the mythical son of Attila the Hun and ancestor of the Hungarians is supposed to ride down the Milky Way when the Székelys ( ethnic Hungarians living in Transylvania ) are threatened.

At the beginning of the 13th century, a group of Székelys lived in the area, having moved from Udvarhelyszék.

According to this theory, the Székelys are a Hungarian group that settled in Transylvania during this first migration.

Their position became even worse after 1437 when the so-called " Union of Three Nations ", an alliance of the Hungarian noblemen, the Székelys, and the Saxons, was formed in order to crush the Bobâlna peasant uprising.

During the Long War, the Székelys formed an alliance with Prince Michael the Brave of Wallachia against the army of Andrew Cardinal Báthory, recently appointed Prince of Transylvania.

Thereafter about 1000 Székelys migrated to Bukovina, then part of Moldavia and still under the suzerainty of the Ottoman Empire.

The Hungarian government settled 4000 of these impoverished Székelys along the Lower Danube in the new villages of Hertelendyfalva, Sándoregyháza and Székelykeve in 1883, in a part of the Banat that was annexed by Yugoslavia in 1918 and today belongs to Serbia.

Bukovina became part of Romania under the 1920 Treaty of Trianon, and the impoverished Székelys soon found themselves oppressed culturally as well as economically, with no teaching in or of Hungarian in their schools.

After the successful campaign, the alliance of Nobles, Székelys and Saxons was reinforced in the agreement called „ Unio Trium Nationum ” ( Union of three Nations ) on February 2, 1438.

According to the 13th-century Gesta Hungarorum (" Deeds of the Hungarians "), at the time of the Hungarian invasion Transylvania was inhabited by Romanians and Slavs and ruled by Gelou, " a certain Romanian ", while Crişana was inhabited by several peoples, among them Székelys.

The fourth quarter shows the coat of arms of Transylvania, Maramureş and Crişana: a shield parted by a narrow fesse, gules ; in the chief, on azure, there is a black aquila with golden beak coming out of the fesse, accompanied by a golden sun on the dexter and a crescent argent on the sinister ( symbolizing the Székelys ); on the base, on or, there are seven crenellated towers, placed four and three ( symbolizing the Saxons ).

A general assembly of the Transylvanian nobles, Saxons, Székelys and Romanians was convoked personally by the monarch in 1291.

What is more he also invited some Székelys and other Transylvanian Hungarians to assist in the administration of Wallachia, where he wished to transplant Transylvania's far more advanced feudal system.

The 16th century also brought about major religious changes: the Saxons converted to Lutheranism, while most of the Hungarians converted to Calvinism or Unitarianism ; only the Székelys remained more than the other " nations " Catholic.

From the late twentieth century onward, many Székelys have migrated to Hungary, with smaller numbers establishing themselves in other European countries.

Hungary's 1941 invasion of Bačka ( Bácska ) in northwestern Vojvodina was followed quickly by the expulsion of postwar Serbian settlers and other measures of forced Magyarization, of which resettlement of the Bukovina Székelys there was one.

The latter's authority was also recognized by the Saxons and the Székelys.

The latter secured the emperor's approval for an invasion of Transylvania and attacked the principality where the Székelys also joined him.

The Székelys or Székely (), sometimes also referred to as Szeklers (,,, ), are a subgroup of the Hungarian people living mostly in the Székely Land, an ethno-cultural region in eastern Transylvania, Romania.

According to the author of the Gesta, his land was inhabited by a nation called Cozar, but the Gesta also implies the presence of Székelys.

The first written reference to the city was in the Latin Novum Forum Siculorum in 1332 followed by mention as Sekulvasarhel ( modern Hungarian: Székelyvásárhely ), meaning " new market of the Székelys ", in 1349.

The Székely territories came under the leadership of the Count of the Székelys ( Latin: Comes Siculorum ), initially a royal appointee from the non-Székely Hungarian nobility who was de-facto a margrave ; from the fifteenth century onward, the voivodes of Transylvania held the office themselves.

* Csaba, the son of Attila the Hun ( Hungary ) who is supposed to ride down the Milky Way when the Székelys are threatened.

He informed the Székelys that he is attacking Transylvania on behalf of the Emperor Rudolf

The founder of the family is László ( Lack ), Count of the Székelys.