Samurai Warriors 2:XL - Masamune's Tale 5 - Showdown at Mikatagahara (360)

This stage is another unique one for Masamune. Just follow his instructions in the beginning and Musashi will be much easier to deal with. Then take over as much of the area as you can before going to Ieyasu, because that's when the trap and reinforcements come into play. After that just defeat Hanzo to escape and go around defeating officers until you decide to go after Ieyasu.