In July 1128 , the two armies came in contact with each other on the banks of the Bradano .
Roger refused to engage , believing that the papal armies would soon fall apart , and soon enough some of the Pope 's allies began deserting to Roger .
In July 1128 , the two armies came in contact with each other on the banks of the Bradano , but Roger refused to engage , believing that the papal armies would soon fall apart , and soon enough some of the Pope 's allies began deserting to Roger .