 In addition to FRETILIN supporters, Chinese migrants were also singled out for execution; five hundred were killed in the first day alone.Though the Indonesian military advanced into East Timor, most of the populations left the invaded towns and villages in coastal areas for the mountainous interior.FALINTIL forces, comprising 2,500 full-time regular troops from the former Portuguese colonial army, were well equipped by Portugal and "severely restricted the Indonesian army's ability to make headway."