Warfare was prevalent in the Maya world. Military campaigns were launched for a variety of reasons, including the control of trade routes and tribute, raids to take captives, scaling up to the complete destruction of an enemy state. Little is known about Maya military organisation, logistics, or training. Warfare is depicted in Maya art from the Classic period, and wars and victories are mentioned in hieroglyphic inscriptions.[150] Unfortunately, the inscriptions do not provide information upon the causes of war, or the form it took.[151] In the 8th–9th centuries, intensive warfare resulted in the collapse of the kingdoms of the Petexbatún region of western Petén.[151] The rapid abandonment of Aguateca by its inhabitants has provided a rare opportunity to examine the remains of Maya weaponry in situ.[152] Aguateca was stormed by unknown enemies around 810 AD, who overcame its formidable defences and burned the royal palace. The elite inhabitants of the city either fled or were captured, and never returned to collect their abandoned property. The inhabitants of the periphery abandoned the site soon after. This is an example of intensive warfare carried out by an enemy in order to completely eliminate a Maya state, rather than subjugate it. Research at Aguateca indicated that Classic period warriors were primarily members of the elite.[153]
From as early as the Preclassic period, the ruler of a Maya polity was expected to be a distinguished war leader, and was depicted with trophy heads hanging from his belt. In the Classic period, such trophy heads no longer appeared on the king's belt, but Classic period kings are frequently depicted standing over humiliated war captives.[150] Right up to the end of the Postclassic period, Maya kings led as war captains. Maya inscriptions from the Classic show that a defeated king could be captured, tortured, and sacrificed.[148] The Spanish recorded that Maya leaders kept track of troop movements in painted books.[154]
The outcome of a successful military campaign could vary in its impact on the defeated polity. In some cases, entire cities were sacked, and never resettled, as at Aguateca.[155] In other instances, the victors would seize the defeated rulers, their families, and patron gods. The captured nobles and their families could be imprisoned, or sacrificed. At the least severe end of the scale, the defeated polity would be obliged to pay tribute to the victor.[156]