The naval battle off Tauris Island in the Adriatic Sea was fought between Caesarean and Pompeiian forces after the Great Roman Civil War. The opposing fleets clashed at such close quarters that melee combat essentially decided the battle.
Having learned from his experience invading Britannia the first time around, Julius Caesar ventured forth once again a year later, but this time with a full military force and his special brand of simple, straightforward, adaptable military genius. The result was essentially Roman dominion over the southern half of Britannia for the next several millennia.
Much like Mongol attempts to invade Japan, Romans faced the challenge of safely transporting their army to a rocky island across a stormy sea.
Conquering a land is not as simple as just moving in and beating people up. Even after battles are won, the local people must accept your rule. If not, you will have to deal with uprisings like Julius Caesar did as he undertook his effort to conquer Gaul.
From a little lowland region of the Netherlands to a burgeoning trade network all over the Indian Ocean reaching as far east as Japan, this company of adventurers became a corporate monopoly through ingenious engineering and mercantilism.