Well, Jack breaks off from Ralph, Piggy, Simon, and Samneric, he starts his own 'tribe' that's focused around hunting. Roger calls him chief to begin with, but if you want the moment he broke off, it would be chapter 8, Gift for the Darkness, when Jack says "I'm not going to play any longer. Not with you." (page 140) Jack decides that he's going to be chief of his tribe on page 146.
But I really do recommend reading the book. It's not that bad.
Chief Hunter Jack died in 1905.
Chief Jack House died in 1971.
Ralph is elected as the chief but Jack assumes the role of chief of the hunters.
he is mad because he wanted to be chief. it is pretty obvious.
The Chief Whip of Trinidad and Tobago is Mr. Jack Warner.
Jack
In "Lord of the Flies," Jack expresses his belief that Piggy doesn't have the right to speak and that he shouldn't be chief in Chapter 1. This demonstrates Jack's early disdain for Piggy and his desire to assert his dominance over the group.
He puts Jack in charge of the choir and asks Jack what he wishes them to be, to which Jack replies "Hunters."
Jack Lew
In "Lord of the Flies," after the boys' assembly, only Jack and his choirboys vote for Jack to be chief. This means the majority of the boys, including Ralph, did not vote for Jack to be chief.
Ralph is appointed as the chief during a vote but Jack resents this and appoints himself chief of his own rival tribe.
As chief(leader).