 The term later received an "H", much like what happened with "Hibernia", and was pluralized as "Hispaniae", as had been done with the Three Gauls.Roman armies invaded the Iberian peninsula in 218 BC and used it as a training ground for officers and as a proving ground for tactics during campaigns against the Carthaginians, the Iberians, the Lusitanians, the Gallaecians and other Celts.It was not until 19 BC that the Roman emperor Augustus (r. 27 BC–AD 14) was able to complete the conquest (see Cantabrian Wars).