Musashi Miyamoto Rare Weapon - Samurai Warriors 4 II

Not Difficult, Just really dependent on luck.
Battle: Conquest of Kyushu (Wisdom and Grace)
Time Limit: 4 Minutes and 30 Seconds (Tight)
Health: No Limit
Kills: No Limit
Officer Kills: No Limit
Allies: None Retreat
Rare Weapon Mission:
4. Such Is the Life of a Strategist
Defeat all Rifle Captains in order to break through the Southern Garrision!
Missions:
1. Plunging into the Trap
Defeat Tadamune Ijuin and his allies in order to rescue Yoshimune Otomo!
2. Countering the Siege
Defeat Tadamoto Niiro and his allies!
Bonus Missions:
6. The Shimazu Hold the Advantage
Prevent Mochihisa from approaching Terumoto Mori!
7. Mission Executed
Prevent Tadatsune Shimazu and Nobumitsu Saruwatari from infiltrating Mt. Tachibana Castle Eastern Garrison!