region south of the Carpathian mountains, Transylvania, which is the region contained within the Carpathians, and Moldova, the region to the right of the mountains, and which is now split between Romanian territory, and the independent country of Moldova (thanks to the Soviets).
Over that vast area the Romanian language, although peppered with small differences in vocabulary and accent, is fundamentally identical. However, the Romans only ever conquered a relatively small part of Romania, in the south-east. Most Dacian tribes were not, in fact, under Roman rule, and, especially in those days, would not have come into direct and constant contact with the Romans (people would be born, and die without having ever left an area of a few square kilometers). 
The official theory is that the Romans colonistsRomanian countries, and this worried the neighboring emperors. Michael received backing from the Austro-Hungarians to drive the Turks from Romanian territory, which he did. He fought them across all three territories, and was received as a hero by all three Romanian countries. He was crowned their king, at which point his allies betrayed him. The Austro-Hungarians sent executioners to meet with him, rather than a diplomatic party. He was summarily executed by decapitation in front of his own command tent.
This historic event is well remembered in our history, but less so are some of the letters between Michael the Brave and other Romanian nobles of the time, in which he spoke not of creating a unified Romanian country, but of uniting Dacia. 
And he is not, by a