Pirates Vs Ninjas

Pirates vs ninjas. It seems to me rather like a massacre of ninjas, because they don't stand a chance against pirates. They just stand on a barren island surrounded by stones unable to defend themselves. On contrary pirates posses quality ship with excellent gear used to destroy ninjas. Which side do you choose? It is common you are part of weaker one, however today it is different. Every time you have to destroy all ninjas in a game area to get further.