Another way that the Romans acquired slaves was through piracy and slave raiding. In the Mediterranean Sea and other regions, Roman ships would often attack merchant vessels and coastal towns, capturing the inhabitants and selling them into slavery. This was a widespread and lucrative practice, and it contributed significantly to the Roman slave population.
In addition to conquest and piracy, the Romans also obtained slaves through trade. There was a well-established slave market in the Roman Empire, and slaves were bought and sold like any other commodity. This trade was largely facilitated by Roman merchants and slave traders, who traveled to different parts of the empire and beyond to acquire and transport slaves.
It is important to note that the institution of slavery was an integral part of the ancient Roman society and economy. Slaves were used in a wide variety of roles, including agricultural labor, domestic service, construction work, and even as gladiators in public spectacles. The presence of slaves allowed the Romans to maintain their high standard of living and cultural achievements, while also providing cheap and disposable labor for various tasks.