The flag adopted for Wallachia by the revolutionaries was a blue-yellow-red horizontal tricolour (with blue above, in line with the meaning "Liberty, Justice, Fraternity"), But in the aftermath of the Crimean War, the electors in both Moldavia and Wallachia voted in 1859 for the same leader, Alexandru Ioan Cuza, as Domnitor ("ruling prince" in Romanian), and the two principalities became a personal union formally under the suzerainty of the Ottoman Empire.
Following a coup d'état in 1866, Cuza was exiled and replaced with Prince Carol I of Romania of the House of Hohenzollern-Sigmaringen.
is also notable for including the first documented occurrence of the country's name: Wallachia is mentioned as Țeara Rumânească (old spelling for "The Romanian Land"; țeara from the Latin terra, "land"; current spelling: Țara Românească).
Two spelling forms: român and rumân were used interchangeably A handful of other languages (including Italian, Hungarian, Portuguese, and Norwegian) have also switched to "o" like English, but most languages continue to prefer forms with u, e.g.
Prior to the Roman conquest of Dacia, the territories between the Danube and Dniester rivers were inhabited by various Thracian peoples, including the Dacians and the Getae.
Roman incursions under Emperor Trajan between 101–102 AD and 105–106 AD resulted in half of the Dacian kingdom becoming a province of the Roman Empire called "Dacia Felix". During this period the province was fully integrated into the Roman Empire, and a sizeable part of the population were newcomers from other provinces.
During World War II, Romania was an ally of Nazi Germany against the Soviet Union, fighting side by side with the Wehrmacht until 1944, when it joined the Allied powers and faced occupation by the Red Army forces.
Romania lost several territories, of which Northern Transylvania was regained after the war.
In the other parts, many small local states with varying degrees of independence developed, but only under Basarab I and Bogdan I the larger principalities of Wallachia and Moldavia would emerge in the 14th century to fight the threat of the Ottoman Empire.
By 1541, the entire Balkan peninsula and most of Hungary had been conquered and integrated into the Ottoman Empire.
It has an area of 238,397 square kilometres (92,046 sq mi) and a temperate-continental climate.