Of Ancient Rome
in 55 BC, Julius Caesar launched his first invasion on Britain. When Rome finally conquered Britain in 43 AD, they established a province called Britannia. Caesar wanted Britain to be part of his empire, which is why he attacked it.
Defeat (Battle of Cannae)
The Battle of Cannae was the worst defeat the Roman Empire ever faced. Carthage (Led by Hannibal) defeated Rome with an army smaller than that of the Romans.
Rome's military strategy was all about being logical and decisive. Their air of confidence boosted the morale of their troops. Roman generals preferred aggressive and full-frontal attacks.