Abstract
The intention of this article is to give a brief overview of how the military power was organised in Rome during the regal period. There is little information about the military organisation of the Romans between 753 and 509 BC. However, some written historical sources have enabled us to reconstruct some aspects of the military life in early Rome. The Indo-European studies and the comparative mythology of the Indo-European peoples also help to understand how the warrior function was valued in early Roman society. Like the other Indo-European peoples, the Romans structured their society in a system reflecting the ideology of the three functions represented, according to G. Dumézil, by the priests, warriors and herdsmen-cultivators. The same conception can be found at the theological level, within the triad Jupiter, Mars, Quirinus, the most important gods of Rome. Romulus, the founder of Rome, is the son of the god Mars, thereby consecrating the predominance of the warlike function within the trifunctional system. The army has always been the main instrument that assured the defence of Rome, but especially the expansion and preservation of its power over the conquered territories