Mel Gibson's "Braveheart" is a fullthroated, red-blooded battle epic about William Wallace, the legendary Scots warrior who led his nation into battle against the English in the years around 1300. It's an ambitious film, big on simple emotions like love, patriotism and treachery, and avoids the travelogue style of so many historical swashbucklers: Its locations look green, wet, vast, muddy and rugged.