Home âº Research Methods âº Correlation. Correlation means association-more precisely it is a measure of the extent to which two variables are related. If an increase in one variable tends to be associated with an increase in the other then this is known as a positive correlation.
A.D. 468. Photo credit: Fourat/Panoramio. Just like the army, the Roman navy has had its fair share of military disasters. In this one, a joint naval expedition (reputedly one the biggest in ancient times) by the Empire and the independent province of Illiricum against the Vandal Kingdom ended in a huge lopsided defeat.his battle marked the first time that a Roman emperor died at the hands of a foreign enemy. Set in the modern-day city of Razgrad, Bulgaria, the battle pitted the Romansâled by the co-emperors Decius and his son Herenniusâagainst the Goths.
In the late fourth century, the Western Roman Empire crumbled after a nearly 500-year run as the worldâs greatest superpower. Historians have blamed the collapse on hundreds of different factors ranging from military failures and crippling taxation to natural disasters and even climate change.he rise of the Eastern Empire. The fate of Western Rome was partially sealed in the late third century, when the Emperor Diocletian divided the Empire into two halvesâthe Western Empire seated in the city of Milan, and the Eastern Empire in Byzantium, later known as Constantinople.