of Osinovo where they were reunited with the rest of the advance party. Osinovo was about behind the frontline at the village of Seltso, and the camp contained about 4,000 troops. At Osinovo, they went into camp with the rest of the advance force, and underwent intensive training. On the river was a flotilla of British monitors and gunboats. The main body of the NRRF arrived in Archangel on 11 July, following two mutinies by British-led White Russian battalions in the area. The Bolsheviks held a fortified line about south of Osinovo. Dvina offensive In August the NRRF was ordered to advance down the Dvina River to attack the Bolsheviks. About 4,000 men of the NRRF, supported by the river flotilla, artillery and aircraft, were set against about 6,000 Bolshevik troops of the 3rd Brigade of the 18th Division, also supported by artillery. D Company of the 45th RF, which included Sullivan and about 20 other Australians, was to push down the western side of the Dvina and take the villages of Sludka and Lipovets from the rear. Other columns were to attack other villages on the river. The D Company column included machine gun sections, mortars, mountain guns and some cavalry. They were ferried across the river to the village of Yakovlevskoye and set off on the afternoon of 7 August. They then undertook a wide-sweeping approach march of nearly through a thick forest to be in position for the attack at 12:00 on 10 August. The aims of the overall offensive were three-fold: to lower Bolshevik morale; to push back the Bolshevik river flotilla so that mines could be laid to impede any follow-up of the imminent British withdrawal; and to improve the morale of the anti-Bolshevik forces. Sludka was the column's first objective, but on 9 August, scouts reported that the location of a swamp made a direct attack on the village impossible. As a result, the column pushed further south to attack the village of Kochamika, after which they would turn north and capture Sludka. The approach march began at 06:00 on 10 August, and the men slogged through the mud to positions at the edge of the forest by 11:00. Thirty minutes later, the British artillery, the river flotilla and aircraft began bombarding Kochamika. At 12:00, the D Company column, which included Sullivan's 16 Platoon, launched its assault, although without the support of the mountain