The Spaniards were generally more technologically advanced in weaponry, and they had the advantage of faster transport (horses). In addition, the Aztecs did not know many sophisticated army tactics and often failed to grasp the importance of supporting and recycling assault units. Aztecs often did not hunt to kill, but rather to sacrifice, so many Spaniards were actually not killed, just wounded heavily, which could enable his fellow army men to rescue him. The Aztecs also placed heavy importance on harvesting and cultural values, so that they could not attack heavily during the winter and harvest months.