the thinly spread Commonwealth lines due to the many rivers and creeks in the area. By midnight, the two Japanese divisions fired star shell to indicate to their commander that they had secured their initial objectives and by 01:00 they were well established. Over the course of two hours, the three Australian battalions that had been engaged sought to regroup, moving back east from the coast towards the centre of the island, which was completed mainly in good order. The 2/20th managed to concentrate three of its four companies around the Namazie Estate, although one was left behind; the 2/18th was only able to concentrate half its strength at Ama Keng, while the 2/19th also moved back three companies, leaving a fourth to defend Tengah airfield. Further fighting followed in the early morning of 9 February and the Australians were pushed back further, with the 2/18th being pushed out of Ama Keng and the 2/20th being forced to pull back to Bulim, west of Bukit Panjong. Bypassed elements tried to break out and fall back to the Tengah airfield to rejoin their units and suffered many casualties. Bennett attempted to reinforce the 22nd Brigade by moving the 2/29th Battalion from the 27th Brigade area to Tengah but before it could be used to recapture Ama Keng, the Japanese launched another attack around the airfield and the 2/29th was forced onto the defensive. The initial fighting cost the Australians many casualties, the 2/20th, losing 334 men killed and 214 wounded. Air operations The air campaign for Singapore began during the invasion of Malaya. Early on 8 December 1941, Singapore was bombed for the first time by long-range Japanese aircraft, such as the Mitsubishi G3M2 "Nell" and the Mitsubishi G4M1 "Betty", based in Japanese-occupied Indochina. The bombers struck the city centre as well as the Sembawang Naval Base and the northern airfields. For the rest of December there were false alerts and several infrequent and sporadic hit-and-run attacks on outlying military installations such as the Naval Base but no raids on Singapore City. The situation had become so desperate that one British soldier took to the middle of a road to fire his Vickers machine gun at any aircraft that passed. He could only say "The bloody bastards will never think of looking for me in the open, and I want to see a bloody plane brought down". The next recorded raid