Wallachia or Walachia (Romanian: Țara Românească pronounced [ˈt͡sara romɨˈne̯askə] or Valahia pronounced [vaˈlahi.a]; archaic: Țeara Rumânească, Cyrillic: Цѣра Румѫнѣскъ / Цѣра Рȣмѫнѣскъ) is a historical and geographical region of Romania. It is situated north of the Danube and south of the Southern Carpathians. Wallachia is sometimes referred to as Muntenia (Greater Wallachia), through identification with the larger of its two traditional sections; the smaller being Oltenia (Lesser Wallachia).

Wallachia was founded as a principality in the early 14th century by Basarab I, after a rebellion against Charles I of Hungary, although the first mention of the territory of Wallachia west of the river Olt dates to a charter given to the voievod Seneslau in 1246 by Béla IV of Hungary. In 1415, Wallachia accepted the suzerainty of the Ottoman Empire; this lasted until the 19th century, albeit with brief periods of Russian occupation between 1768 and 1854. In 1859, Wallachia united with Moldavia (as United Principalities), to form the basis of the modern state of Romania, with Transylvania joining 59 years later (1918) to form the new Kingdom of Romania which was first established 1881.

Michael the Brave (Romanian: Mihai Viteazu(l) pronounced [miˈhaj viˈte̯azu(l)] or Mihai Bravu pronounced [miˈhaj ˈbravu], Hungarian: Vitéz Mihály; 1558 – August 9, 1601) was the Prince of Wallachia (1593–1601), of Transylvania (1599–1600), and of Moldavia (1600). He ruled all three principalities in a personal union for a short period of time.

During his reign, which coincided with the Long War, these three principalities forming the territory of present-day Romania and the Republic of Moldova were ruled for the first time by a single Romanian leader, although the personal union lasted for less than six months. He is regarded as one of Romania's greatest national heroes.

His rule over Wallachia began in the autumn of 1593. Two years a war with the Ottomans began, a conflict in which the Prince fought the Battle of Călugăreni, considered one of the most important battles of his reign. Although the Wallachians emerged victorious from the battle, Michael was forced to retreat with his troops and wait for aid from his allies, Prince Sigismund Báthory of Transylvania and Holy Roman Emperor Rudolf II. The war continued until a peace finally emerged in January 1597, but this only lasted for a year and a half. Peace was again reached in late 1599, when Michael was unable to continue the war due to lack of support from his allies.

Prince Michael Petrović-Njegoš of Montenegro (September 14, 1908, Podgorica - March 24, 1986, Paris) was the third (but eldest surviving) son of Prince Mirko of Montenegro, Grand Voivode of Grahovo and Zeta (1879–1918), and Natalija Konstantinovic, a cousin of Aleksandar Obrenović of Serbia. He was pretender to the throne of Montenegro, holding the title Grand Duke of Grahovo and Zeta, in succession to his father. Nicholas I of Montenegro was Michael's grandfather. Michael had recognized and acknowledged the Unification of Montenegro with Serbia, renouncing the throne. In World War II he was held prisoner by the Nazis after refusing to take up the throne of the Axis forces' re-established Montenegrin puppet-state. During the period of Communism, he was an active member of the Serb diaspora revolutionary organization and a diplomatic worker against the Communist dictatorship of Marshall Tito.

He was a member of the Crown Council of King Peter II of Yugoslavia.

Michael was born the son of Prince Mirko of Montenegro in Cetinje in 1908. In 1916 the defence of Montenegro against the invasion by Austria-Hungary during the First World War collapsed and he, alongside the rest of the royal family, fled to Italy. Here, he briefly attended a boarding school in Naples before joining his mother who had taken up residence in Eastbourne in the United Kingdom where he completed his primary education.

Moravian Wallachia (Czech: Valašsko) is a mountainous region located in the easternmost part of Moravia, Czech Republic, near the Slovakian border. The name Wallachia was formerly applied to all the highlands of Moravia and neighboring Silesia, although in the nineteenth century a smaller area came to be defined as ethno-cultural Moravian Wallachia. The traditional dialect (rarely heard these days) represents a mixture of elements from Czech and Slovak, and has a distinct lexicon of Romanian and Balkan origin relating to the pastoral economy of the highlands.

The name comes from the exonym of the Romanian shepherd migrants (see Vlachs), who advanced along the Carpathian range between the 14th and 17th centuries. On their way they gradually lost their original language with the exception of some Romanian words they use in their Czech and Slovak dialect, but they preserved much of their culture (especially folklore, songs and costumes) and economic base, namely sheep breeding.