The crossword solution for the term 'Gaul Conqueror' is 'CAESAR', a six-letter word. Gaius Julius CAESAR was a Roman general and statesman who played a critical role in the events that led to the demise of the Roman Republic and the rise of the Roman Empire. He is remembered as one of the most influential figures in world history, and his conquest of Gaul (modern-day France) was a major factor in the expansion of the Roman Empire.