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.
When they were most vulnerable the Germanic tribes allied and attacked Rome [the city], as well as the Italian peninsula, several times. By 410 CE [AD], or somewhat later, Rome finally lost it's empire, although it was still called the 'Holy Roman Empire' in the time of the Carolingian dynasty...hey were defeated many times by the Persians(Parthian and Sassanian Dynasties), but Persia never truly succeeded in conquering Rome since Persia was fighting many other empires and confederations and was invaded in the 7th century by the Muslims.