Ralph and Piggy hadn't joined Jack's tribe and when they wondered where everyone was they specifically mentioned Samneric and Bill by name. So, essentially apart from those 5 biguns, Simon and probably the littluns, by the start of chapter 9 most of the boys had already defected to Jack's tribe.
jacks tribe on ch. 11
Jack makes them join his group in chapter 11.
You need to think about why its important and maybe that will help you find the answer rereading may be an option too
Jack's first announcement at the assembly in lord of the flies was that he was a hunter along with the other boys that wanted to join 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.
Jack invites anybody to come with him to join his tribe. His tribe does things like shoving spears up pigs' asses (many people think that they fed their penises to the pigs, but this is FALSE).
The people on the island with jack AFTER he forms a new tribe, is everyone except for some little ones, Ralph, Sam And Eric ( Though they get kidnapped and forced to join later ) and Piggy. ( Though he gets killed by roger, who had joined the tribe with Jack )
The two boys who left Ralph's group to join Jack's group in "Lord of the Flies" are Sam and Eric, also known as Samneric. They were lured by the promise of hunting and adventure in Jack's group, which appealed to their primal instincts and need for excitement.
At the end of chapter eleven samneric were taken by Jack and his tribe and forced to join Jack's tribe. In twelve they have to work with the tribe to try and find Ralph on the island. Nothing real serious happens to them. they don't get hurt of killed.
No, in "Lord of the Flies," Ralph does not surrender to Jack by eating the meat. Ralph refuses to join Jack's tribe and indulges in eating the meat as an act of rebellion against Jack's authority. Ralph chooses to maintain his independence and integrity rather than succumb to Jack's leadership.
Jack threw a feast on the beach and invited all the boys to attend. He gave them all meat and then invited them to join his tribe, adding that his hunters would protect them from the beast.
Samneric choose to join Ralph and Piggy in Chapter 12 of "Lord of the Flies," after they are captured by Jack's tribe and forced to betray Ralph's hiding place. They express regret for their actions and seek safety with Ralph's group.