Governor-General Emilio Terrero y Perinat received authority from Madrid to take action for the appointment of Datu Harun.

[2] For the celebration of his appointment, Harun was escorted to Jolo, Sulu by 200 Spanish soldiers for his return from Manila.

[2] Amirul Kiram's activities and the Maimbung forces' attacks on Parang caused significant unrest in the region.

Small expeditions were sent to Tapul, Lugus, and Siasi, but active measures against Maimbung were delayed until reinforcements arrived.

[2] On July 1887, Inchi Jamila went to Jolo to expressed their surrender on behalf of her husband Raja Muda Amirul Kiram to Sultan Harun and Sulu Governor Arolas.

In October 1887, Bwal and the northern Lu’uk district were punished, resulting in the evacuation of Sulus and the destruction of houses.

In 1888, large-scale expeditions were conducted against various Sulu localities, leading to the deaths of hundreds or thousands of Sulus.