 Musa enslaved the Marrevoni of the interior (at the behest of one of the vassal tribes), bringing more ivory and rubber with his conquest.In the 1860s, the Portuguese attacked the Sultanate, however their early campaign proved fruitless and they still had no direct control over Angoche.Following the death of the ruling monarch in 1877, Angoche descended into a civil war with 7 different claimants competing for power.