Complex sentence: Camillus estimated that they would be given to boisterous celebrations in Sutrium, so he rushed to the confrontation; the Etruscans were so intoxicated that Camillus recaptured Sutrium with ease.
Split into simpler sentences: Camillus estimated that they should be given in boisterous celebrations, within Sutrium, so he rushed to the confrontation. Effectively, the Etruscans were so intoxicated that Camillus recaptured Sutrium with ease.