The Etruscans, like the contemporary cultures of Ancient Greece and Ancient Rome had a persistent military tradition. In addition to marking the rank and power of certain individuals in Etruscan culture, warfare was a considerable economic boon to Etruscan civilization. Like many ancient societies, the Etruscans conducted campaigns during summer months; raiding neighboring areas, attempting to gain territory and combating piracy as a means of acquiring valuable resources such as land, prestige goods and slaves. It is also likely individuals taken in battle would be ransomed back to their families and clans at high cost. Prisoners could also potentially be sacrificed on tombs to honor fallen leaders of Etruscan society, not unlike the sacrifices made by Achilles for Patroclus.