3 important moments in TFA

I think the most important plot of TFA is following: 1)Okonkwo accidentally kills Ikemefuna, 2)Okonkwo gets vanished from the village, and 3)Okonkwo commits suicide.

1) Okonkwo accidentally kills Ikemefuna
I think this is the first "crisis" of the whole story that Okonkwo accidentally kills Ikemefuna, and because of that, Okonkwo gets vanished from the village, and that is the beginning step for climax of this novel.

2) Okonkwo gets vanished from the village
This could be a small climax and another crisis at the same time, as Okonkwo gets vanished from the village because of 1), and because of his vanishment and while he was out of the village, the village gets colonized by the British power. This novel's protagonist is Okonkwo, therefore the emotion shift on him gives the most important scene of the whole story.

3) Okonkwo commits suicide
This could be the biggest climax and the conclusion of the story because as Okonkwo's emotional shift in the final stage of the novel gets very aggressive on the change of the culture in his village while he was gone, and it took Okonkwo to kill himself at the end of the novel.