There are many ways to prepare for battle. Each Warrior Culture has it's own as we mentioned in an earlier post "Navajos Raid Las Vegas". The Maoris of New Zealand had their own warrior culture that survives today. The Haka was a part of their prepartion and when done right, can be very stirring.
This how it should be done.
Many American football players have tried to adopt the Haka, but just don't quite get it. We dare you to watch this and not be inspired.