How might the changes that Uchendo discusses in Chapter 15 of Things Fall Apart have made the Igbo more vulnerable to colonization?

This ominous chapter foreshadows the future that threatens Umuofia. The whites send a few men to explore the terrain, and on the slightest provocation retaliate with terrible force. Although the people of Abame were wrong to murder the white man (and notice that Uchendu stresses this point), the retaliation of the white man is excessive. For the ignorant and fearful murder of one man, the whites respond with a brutal massacre that destroys a whole village. Although we are not given the exact number of deaths, Abame probably had a considerable population: remember that Umuofia has some ten thousand adult males. The effects of European colonialism are finally beginning to penetrate into Nigeria. Although Obierika mentions old legends of white men who took slaves from distant parts of Africa, these stories have always been dismissed as myth.