Once again, they were driven further north. The picture that there were breaks in the attacks and then a renewal of attacks in the following years is a reasonable depiction of Mesoamerican warfare. First, there would be the need to stop for harvests. Secondly, however, there are two seasons in Central America, the rainy season and the dry season. Warfare tended to be fought in the dry season and not during the rainy season. John L. Sorenson looked at the descriptions of the months in which battles were fought and found that they also tend to cluster into two seasons. Warfare was only common in the dry season, a condition common to cultures in that region.