Well in chapter 10 Jack and his tribe of savages invade Ralph's tribe (made of up Ralph, Sam and Eric, Piggy, and one/two littluns) in order to steal Piggy's glasses, which is overall the power to start a fire on the island. Jack might have mentioned this plan in chapter 9 so I'm hoping this is the right answer to your question.
They were fighting with Roger, and Jack stole fire from Piggy and Ralph.
There is no attack by Jack's tribe on Ralph and his followers. Jack led a night-time raiding party, comprising of himself, Roger and Maurice, to steal Piggy's glasses in chapter 10: The Shell and the Glasses.
Jack and his hunters break in and steal piggy's glasses
Ralph opposes Jack's violent ways. He also trying to stop the boys approaching Jack's view of the boys. Moreover, by hunting Ralph, Jack is trying to show who the real leader is and why everyone should follow him.
It's so thickly coated with irony, Ralph's plan throughout the entire book is to keep a fire going to be rescued, Jack could care less. Also, Jack wanted to flush out the island with fire just to finish Ralph off, when instead it brings rescue to Ralph.
In William Golding's novel "Lord of the Flies," it is Jack's group of savages who accompany him to steal fire from Ralph's camp. They violently attack Ralph and the other boys to steal the fire and assert their control over the island.
They were fighting with Roger, and Jack stole fire from Piggy and Ralph.
There is no attack by Jack's tribe on Ralph and his followers. Jack led a night-time raiding party, comprising of himself, Roger and Maurice, to steal Piggy's glasses in chapter 10: The Shell and the Glasses.
piggy's glasses
the guy who accompanies jack along with Robert to steal fire from Ralph's group
Jack and Roger have sharpened a stick at both ends to hunt and kill Ralph. Their plan is to hunt Ralph like they did with the sow, to terrify him and flush him out. Samneric warn Ralph that they are being hunted and that Jack's tribe will sharpen a stick at both ends and have Roger guard the way in.
Jack and his hunters break in and steal piggy's glasses
Ralph opposes Jack's violent ways. He also trying to stop the boys approaching Jack's view of the boys. Moreover, by hunting Ralph, Jack is trying to show who the real leader is and why everyone should follow him.
Samneric because they where forced to join Jack Mildrew's tribe and they told Ralph about Jack's plan to search and destroy Ralph.
Ralph and Piggy confront Jack to try and reason with him and bring the group back together. Their plan fails because Jack is consumed by power and control, and he refuses to listen to reason or cooperate with them. Jack's actions ultimately lead to chaos and violence within the group.
Prior to holding a feast on the beach Jack, accompanied by four hunters visited Ralph's group at the shelters. Two unnamed hunters grabbed burning braches and ran off along the beach with them. Jack, flanked by Maurice and Robert, delivered a speech inviting the rest of the boys to his feast. Later in the book Jack selected Roger and Maurice to accompany him on his raid to 'get fire' from Ralph's group, infact they stole Piggy's glasses.
The boys plan on raiding Ralph's camp because they have been influenced by Jack, who is power-hungry and wants to be the leader. They believe that by raiding Ralph's camp, they can eliminate competition and gain more control over the group.