Members of the Royal Brunei Malay Regiment (RBMR) participated in a historic incident on 8 October 1966, when they searched and subsequent capture of the four TKNU remnants in Bukit Belalong, which is located in Temburong District's southern region.

Junior Lieutenants Musa and Hussein bin Mohammad were given instructions to carry out the duty with their respective platoons.

[3] In the subsequent year, the Sultan Omar Ali Saifuddien III bestowed the Order of Perwira Agong Negara Brunei First Class (PANB) to Second Lieutenant Musa during the investiture ceremony held on 18 April 1967 in Istana Darul Hana.

[3] Using their military expertise, he and Second Lieutenant Hussein successfully apprehended four insurgents in the woods near Sungai Mani, Batang Duri.

[2] In 1967, Junior Lieutenant Musa and two others attended a Commonwealth firearms course in Warminster Military School, England for three weeks.