Don't forget to have archers
Another idea is to take a spy with you and a unit of light cavarly.
use your spy and if the spy manages to penatrate into the city then try to besiege Bruges.If the spy manages to oen the gates it will be an easy win for you.When a spy opens the gates the defenders are competely unorganised so send quickly the light cavarly to capture the city.When the cavarly reach the cental square, the pikemen wil begin marching toward your cavarly in the cebtral square.Meanwhile you can bring you forces into the city and...this is the end for the Pikemen