Over the next few weeks, Buller received further reinforcements, and also acquired sufficient carts and transport to operate away from the railway line which was his main supply line. Buller devised a new plan of attack to relieve Ladysmith. His army was to launch a two-pronged offensive designed to cross the Tugela River at two points and create a bridgehead. They would then attack the defensive line that blocked Buller's advance to Ladysmith. The area was only from Ladysmith. Buller delegated control of his main force to General Sir Charles Warren, to cross at Trichardt's Drift. Buller would then send a second smaller force, under Major-General Neville Lyttelton to attack east of Warren's force as a diversion at Potgieter's Drift. Once across the Tugela the British would attack the Boer defensive positions and then cross the open plains to relieve Ladysmith.