So Muneshige's scenario in Pokemon Conquest is kinda like Hideyoshi's: Conquer all 17 territories. Except that the primary warlords (Hideyoshi, etc.) are out of the picture - it's all between the "junior" warlords instead.
A few early tactical blunders cost me the chance to recruit a few Warriors, but I did take Chrysalia and Illusio pretty easily (with small teams, even). Few turns later a mostly Psychic team from Terrera invades. I retreat my three defenders (Muneshige included) to Illusio without a fight (may as well deny them the exp. for defeating me). Then a team from Aurora tries to invade Ignis, I'm worried that my four Mons there aren't strong enough ... except they totally are, Scraggy and Luxio held the battle on their own. Next turn somebody tries invading again, with a two-mon team, but Onix and Sewaddle still handle it on their own.
Conquered Terrera in 3-4 turns - waited for the gust of wind to blow by, then made a wild dash for all three lifts (Muneshige's Typhoon ability, range boost across the whole team, really helped here). Took all three flags the following turn. Shortest castle battle ever, barely even traded attacks with the defending team (who I may or may not have been able to beat in a straight battle). And the team that invaded Chrysalia also left Pugilis with only one Mon defending it - poor Igglybuff versus my Shinx, one on one in the ring. Easy....