Possible Clues:

• Campaigner for a cause, like Richard the Lionheart
• Richard I, for instance, was rather more blunt about it
• Credit America with upsetting revolutionary campaigner
• Sounds as if he'd got across across the sea to fight for
• He got cross and fought
• For example, Richard I was more blunt about it
• Advocate being cold and less civil when held up
• Campaigner's appeal to support vineyard - claret coming up
• An old soldier being more earthy about South America
• He struggled to maintain faith in the past