Up to 1866 Rumanian foreign politics may be said to have been non-existent. The offensive or defensive alliances against the Turks concluded by the Rumanian rulers with neighbouring princes during the Middle Ages were not made in pursuance of any definite policy, but merely to meet the moment's need.
The problem of the origin and formation of the Rumanian nation has always provided matter for keen disputation among historians, and the theories which have been advanced are widely divergent. Some of these discussions have been undertaken solely for political reasons, and in such cases existing data prove conveniently adaptable. This elastic treatment of the historical data is facilitated by the fact that a long and important period affecting the formation and the development of the Rumanian nation (270-1220) has bequeathed practically no contemporary evidence.
About the fifth century B.C., when the population of the Balkan-Carpathian region consisted of various tribes belonging to the Indo-European family, the northern portion of the Balkan peninsula was conquered by the Thracians and the Illyrians. The Thracians spread north and south, and a branch of their race, the Dacians, crossed the Danube. The latter established themselves on both sides of the Carpathian ranges, in the region which now comprises the provinces of Oltenia (Rumania), and Banat and Transylvania (Hungary).
The first attempt to organize itself into a political entity was made by the Rumanian nation in the thirteenth century, when, under the impulse of the disaffected nobles coming from Hungary, the two principalities of 'Muntenia' (Mountain Land), commonly known as Wallachia and 'Moldavia', came into being. The existence of Rumanians on both sides of the Carpathians long before Wallachia was founded is corroborated by contemporary chroniclers.