Charles the Great (better known to the Western world by his French name, Charlemagne) was king of France. But, like most kings during the Middle ages he was not content to remain king of such a small...
because he didn't always make the best decisions
The Great War was not named "great" because it was good, rather because the Great War was was the first of its kind, one that involved many nations.
Because he won most of his battles
because he was a great conqueror.