Making money from money : climate, colder climates lead to failed crops, trouble makers, refuse passive submission to the roman gods, refuse to fight in the army, conduct their religion in private, where they eat flesh and drink blood . Constantine: ad 311: battle of the milvian bridge vs. maxentius, maxentius was the last general left standing between constantine and becoming emperor, before the battle, constantine saw a symbol in his dream. c) The barbarians: rome was bordered by the rhine and the danube rivers, which were very deep, climate change: the climate back then was changing rapidly. i) ii) In the year 404-405, there was the coldest winter on record. Roman empire. i: huns hungary, ostrogoths italy, visigoths spain, vandals north africa, franks france d, angles/saxons angle land = England: as the barbarians move in, the empire begins to contract, leading to the beginning of the.