sentences:  By the Terminal Classic the Petexbatún had been swept by endemic warfare and all the major cities were in ruins.What had begun as struggles for dominance of the Petexbatún degenerated into intense internecine warfare and the situation in the region at the end of the 8th century has been described as a "landscape of fear" with many sites becoming fortified.Population levels at Tamarindito fell and many residential groups were abandoned, with occupation only continuing at a minority of investigated groups to the east of the site core.