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Of these objectives, 3 PARA was tasked with taking Mount Longdon on the night of June 11/12, to coincide with attacks on Two Sisters Mountain by Lieutenant-Colonel Andrew Whitehead's 45 Commando and Mount Harriet by Lieutenant-Colonel Nick Vaux's 42 Commando.

Of these objectives, 3 PARA was tasked with taking Mount Longdon on the night of June 11/12, to coincide with attacks on Two Sisters Mountain by Lieutenant-Colonel Andrew Whitehead's 45 Commando and Mount Harriet by Lieutenant-Colonel Nick Vaux's 42 Commando.

On June 10, Lieutenant Colonel Hew Pike gave his orders in the Regimental Headquarters at Estancia House for the attack on Mount Longdon and Wireless Ridge. They were told to expect around 300 Argentinian soldiers from Lieutenant-Colonel Omar Giménez's 7th ''La Plata'' Mechanized Infantry Regiment defending the positions who were well dug in and provided with artillery cover from 18 Argentine 105mm Oto Melara howitzers from Lieutenant-Colonel Martín Antonio Balza's 3rd Artillery Group and a further 18 Oto Melaras near Government House from Lieutenant-Colonel Carlos Alberto Quevedo's 4th Airborne Artillery Group. In addition, the area had been heavily mined.

On June 10, Lieutenant Colonel Hew Pike gave his orders in the Regimental Headquarters at Estancia House for the attack on Mount Longdon and Wireless Ridge. They were told to expect around 300 Argentinian soldiers from Lieutenant-Colonel Omar Giménez's 7th ''La Plata'' Mechanized Infantry Regiment defending the positions who were well dug in and provided with artillery cover from 18 Argentine 105mm Oto Melara howitzers from Lieutenant-Colonel Martín Antonio Balza's 3rd Artillery Group and a further 18 Oto Melaras near Government House from Lieutenant-Colonel Carlos Alberto Quevedo's 4th Airborne Artillery Group. In addition, the area had been heavily mined. British sappers later counted 1,500 frozen anti-personnel mines on the western lower slopes of Mount Longdon. Miraculously all but two mines failed to detonate.<ref>[https://www.sunderlandecho.com/news/feature-sunderland-falklands-veterans-remember-the-battle-of-mount-longdon-1-4623600 Sunderland Falklands veterans remember the Battle of Mount Longdon]</ref>

Mount Longdon is a long narrow feature of rocky terrain, running from east to west with two summits. Major Carlos Carrizo-Salvadores, second-in-command of the 7th 'La Plata' Mechanized Infantry Regiment, was the senior officer on the eastern summit, and Marine Captain Sergio Andrés Dachary on the western one. As a result of its geography only one company attacking could advance along it. The plan was that the rifle companies would be led to the start line at the stream, west of Mount Longdon by members of D (Patrol) Company. The start line would be known as ‘Free Kick’.

Mount Longdon is a long narrow feature of rocky terrain, running from east to west with two summits. Major Carlos Carrizo-Salvadores, second-in-command of the 7th 'La Plata' Mechanized Infantry Regiment, was the senior officer on the eastern summit, and Marine Captain Sergio Andrés Dachary on the western one. As a result of its geography only one company attacking could advance along it. The plan was that the rifle companies would be led to the start line at the stream, west of Mount Longdon by members of D (Patrol) Company. The start line would be known as ‘Free Kick’.