The same method was used with the Scordisci and Dacians of the Danube.

More often the mortality of war so thinned the population, that the settlement of Roman military colonies among them sufficed to keep down revolt and to Romanize the surviving fragment.

The large area of Romance speech found in Roumania and eastern Hungary, despite the controversy about its origin,[162] seems to have had its chief source in the extensive Roman colonies planted by the Emperor Trajan in conquered Dacia.[163] In Iberian Spain, which bitterly resisted Romanization, the process was facilitated by the presence of large garrisons of soldiers.
Between 196 and 169 B.C.the troops amounted to one hundred and fifty thousand, and many of them remained in the country as colonists.[164] Compare the settlement of Scotch troops in French Canada by land grants after 1763, resulting in the survival to-day of sandy hair, blue eyes, and highland names among the French-speaking _habitants_ of Murray Bay and other districts.

The Turks in the fifteenth century brought large bodies of Moslem converts from Asia Minor to garrison Macedonia and Thessaly, thereby robbing the Anatolian Plateau of half its original population.

Into the vacuum thus formed a current of nomads from inner Asia has poured ever since.[165] [Sidenote: Withdrawal and flight.] Every active historical movement which enters an already populated country gives rise there to passive movements, either compression of the native folk followed by amalgamation, or displacement and withdrawal.
The latter in some degree attends every territorial encroachment.