If you're looking for manga similar to Moero Arthur: Hakuba no Ouji, you might like these titles.
It is the middle of the 18th century. Beginning with the English, the Western European countries have begun to cast their gaze across the sea in an age of great romance. In such an age lives a boy who hides great power within him. What destiny awaits him as he struggles and cuts through the raging waves?
In 52 BC, the Chieftain of the Arveni tribe, Vercingetorix, united the Gauls in a major revolt against the power of the Romans. This is his story, beginning with his rise to power. In one of the tribes, he rescues the 11-year-old Taranis, the only son of a Gallic hero who was executed by the Romans. Taranis follows Vercingetorix as he raises his army to fight for the freedom of Gaul.
This is the story of two of the greatest military commanders in history: the Roman Publius Cornelius Scipio and the Carthaginian Hannibal. The story follows the two of them from their early life on. Hannibal is initially shown as a strangely silent infant, who seemed like the gods forgot to put a soul in his little body. However, he soon begins to speak in a way that shows his remarkable abilities. Hannibal and Scipio are driven enemies, and their struggle shaped an era.
Set in Continental Europe, it depicts the adventures of British aristocrat Dorian Red Gloria and his alter ego Eroica, Europe's most wanted international art thief. His nemesis — Major Klaus Heinz von dem Eberbach, a German NATO intelligence officer — has tried for years to catch the man who claims each crime scene with a card signed "From Eroica with Love." Things are just getting started when a trio of telepathically linked teenagers becomes aware of Dorian's identity and plans to capture him. But their plot goes awry as the master thief branches out — no longer content with stealing great art, he's moving on. Now the trio must foil his attempts to kidnap their leader, Caesar, as they try to save the great art treasures of Europe!
Set from 1581 to 1586 with flashbacks further into the past, this is the story of Tyrian Persimmon. Born to a Spanish mother with an English husband in this era of conflict between the two contries, Tyrian favors Spain. His father suspects that Tyrian is not his son because he doesn't look like the man at all, and regularly beats him. His mother's lover is discovered to be a Spanish spy and flees the country. Tyrian is determined to join the navy and eventually rejoin Geraldo. At the age of 19 he begins to make his ruthless way up the ranks of the English navy.
The story of a girl cursing destiny and a girl who believes in miracles, in the worst era of Europe.
In the 17th century, the Holy Roman Empire was ravaged by the Thirty Years' War. In the middle of this chaos appeared a japanese mercenary named Isaak. His fierce battle begins.