Indonesia and thus no need was seen for consulting the East Timorese either. In early September, as many as two hundred special forces troops launched incursions, which were noted by US intelligence, and in October, conventional military assaults followed. Five journalists, known as the Balibo Five, working for Australian news networks were executed by Indonesian troops in the border town of Balibo on 16 October. John Taylor writes that Indonesia invaded for three main reasons: (1) to avoid the “negative example” of an independent province, (2) to have access to the high initial estimates of oil and natural gas under the Timor Sea (initial estimates which turned out to be largely mistaken), and (3) following the fall of South Vietnam, to become Southeast Asia's major military partner of the United States. Invasion On 7 December 1975, Indonesian forces invaded East Timor. Operasi Seroja (1975–1977) Operasi Seroja (Operation Lotus) was the largest military operation ever carried out by Indonesia. Following a naval bombardment of Dili, Indonesian seaborne troops landed in the city while simultaneously paratroopers descended. 641 Indonesian paratroopers jumped into Dili, where they engaged in six-hours combat with FALINTIL forces. According to author Joseph Nevins, Indonesian warships shelled their own advancing troops and Indonesian transport aircraft dropped some of their paratroopers on top of the retreating Falantil forces and suffered accordingly. By noon, Indonesian forces had taken the city at the cost of 35 Indonesian soldiers killed, while 122 FALINTIL soldiers died in the combat. On 10 December, a second invasion resulted in the capture of the second biggest town, Baucau, and on Christmas Day, around 10,000 to 15,000 troops landed at Liquisa and Maubara. By April 1976 Indonesia had some 35,000 soldiers in East Timor, with another 10,000 standing by in Indonesian West Timor. A large proportion of these troops were from Indonesia's elite commands. By the end of the year, 10,000 troops occupied Dili and another 20,000 had been deployed throughout East Timor. Massively outnumbered, FALINTIL troops fled to the mountains and continued guerrilla combat operations. In the cities, Indonesian troops began killing East Timorese. At the start of the occupation, FRETILIN radio sent the following broadcast: "The Indonesian forces are killing indiscriminately. Women and children are being shot in the streets. We are all going to be killed.... This is an appeal for international help. Please do something to stop this invasion." One Timorese refugee told later