Several bloody skirmishes drove the Argentines to their second line of defences, based on the heights of Mount Harriet, Two Sisters ridge, and Mount Long-don. Each of these would have to be secured before the British could move on to the final defences at Mount Tumbledown and Sapper Hill before the final push on Port Stanley. It was decided that this would involve simultaneous night attacks on each of the hills.
The operations by 3 Commando Brigade would be carried out as follows:
• Night attack conducted by 3 Para on Mt Longdon (north)
• A night attack by 45 Commando on Two Sisters (central)
• A night attack by 42 Commando (42 Cdo) on Mt Harriet (south).
A lack of heavy transport helicopters due to the loss of the Atlantic Conveyor meant that most supplies had to be carried in by foot. Though the British arrived in position on 5 June, these delays meant the night attack could not be planned until the night of 11/12 June. This did however mean that the British had time to conduct extensive recon patrols.
