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On their right, ''Yankee'' Company swung further right to come up alongside them, managing to knock out some of Major Cordon's machine guns holding up ''Zulu'' Company. 8 Troop was then able to advance towards the top covered by 7 Troop, and went on to clear enemy positions on the southern side of their objective, while 7 Troop went on to do the same on the northern side. Two and a half hours after crossing the start line, ''Zulu'' Company had taken the enemy strongpoint of ''Summer Days''. During this time, 9 Troop stayed back in reserve after suffering casualties from Major Jaimet's mortars. ''Yankee'' Company now moved between the Two Sisters peaks and below ''Zulu'' Company's 8 Troop, and headed for the eastern part of Two Sisters under heavy fire. Pushing on, and again using anti-armour weapons against enemy positions, all of Two Sisters was in 45 CDO's hands before dawn. As they reorganized and dug in, heavy Argentinian shelling started. Lieutenant-Colonel Whitehead prepared to move ahead towards Tumbledown Mountain, but was stopped by Brigadier Thompson. 45 Commando had now taken one of the main Argentinian defenses for the loss of seven Marines and a Sapper of the Royal Engineers killed by small-arms and mortars.

On their right, ''Yankee'' Company swung further right to come up alongside them, managing to knock out some of Major Cordon's machine guns holding up ''Zulu'' Company. 8 Troop was then able to advance towards the top covered by 7 Troop, and went on to clear enemy positions on the southern side of their objective, while 7 Troop went on to do the same on the northern side. Two and a half hours after crossing the start line, ''Zulu'' Company had taken the enemy strongpoint of ''Summer Days''. During this time, 9 Troop stayed back in reserve after suffering casualties from Major Jaimet's mortars. ''Yankee'' Company now moved between the Two Sisters peaks and below ''Zulu'' Company's 8 Troop, and headed for the eastern part of Two Sisters under heavy fire. Pushing on, and again using anti-armour weapons against enemy positions, all of Two Sisters was in 45 CDO's hands before dawn. As they reorganized and dug in, heavy Argentinian shelling started. Lieutenant-Colonel Whitehead prepared to move ahead towards Tumbledown Mountain, but was stopped by Brigadier Thompson. 45 Commando had now taken one of the main Argentinian defenses for the loss of seven Marines and a Sapper of the Royal Engineers killed by small-arms and mortars.

The Argentinians no longer held the peaks and began to withdraw towards Mount Tumbledown. The 6th Regiment rifle platoon (under 2d Lt. Aldo Eugenio Franco) entrusted with covering this withdrawal was most effective and a number of Argentinian NCOs and conscripts in this platoon were decorated for bravery.  

The Argentinians no longer held the peaks and began to withdraw towards Mount Tumbledown. The 6th Regiment rifle platoon (under 2d Lt. Aldo Eugenio Franco) entrusted with covering this withdrawal was most effective and a number of Argentinian NCOs and conscripts in this platoon were decorated for their bravery on Two Sisters and Tumbledown.  

Sergeant-Major George Meachin of ''Yankee'' Company, later praised the fighting spirit of the Argentinian defenders:{{cquote|We came under lots of effective fire from 0.50 calibre machine guns …At the same time, mortars were coming down all over us, but the main threat was from those machine-gunners who could see us in the open because of the moonlight. There were three machine-guns and we brought down constant and effective salvoes of our own artillery fire on to them directly, 15 rounds at a time. There would be a pause, and they’d come back at us again. So we had to do it a second time, all over their positions. There’d be a pause, then ‘boom, boom, boom,’ they’d come back at us again. Conscripts don’t do this, babies don’t do this, men who are badly led and of low morale don’t do this. They were good steadfast troops. I rate them.<ref>The FN FAL Battle Rifle, Bob Cashner, Page 57, Bloomsbury Publishing 2013</ref>}}

Sergeant-Major George Meachin of ''Yankee'' Company, later praised the fighting spirit of the Argentinian defenders:{{cquote|We came under lots of effective fire from 0.50 calibre machine guns …At the same time, mortars were coming down all over us, but the main threat was from those machine-gunners who could see us in the open because of the moonlight. There were three machine-guns and we brought down constant and effective salvoes of our own artillery fire on to them directly, 15 rounds at a time. There would be a pause, and they’d come back at us again. So we had to do it a second time, all over their positions. There’d be a pause, then ‘boom, boom, boom,’ they’d come back at us again. Conscripts don’t do this, babies don’t do this, men who are badly led and of low morale don’t do this. They were good steadfast troops. I rate them.<ref>The FN FAL Battle Rifle, Bob Cashner, Page 57, Bloomsbury Publishing 2013</ref>}}