How does the author use foreshadowing in Journey into a Dark Heart?

The story is saturated with references to war. The general fought in World War I, a war that, Joseph K. notes, has sparked many "voices throughout Europe that rail against war." This war also served as a springboard for the general's published lies about African colonization. Joseph K. debunks these lies, which state that the Africans appreciate the civilizing effect of the Western world and that they willingly fought for the Germans in World War I. The truth, as Joseph K. notes, is that "they walked into that war on the point of a German bayonet, with their heads in a cloud of promises and religious hot air." Although David thinks that the general will kill Joseph K. for this accusation, the general admits that he lied, saying that "A military mask may be necessary . . . if one is to arrive at a deeper political truth." The general also feels that World War I, during which he successfully defended the German colonies of Africa against a much larger force, "proved the potential within our colonies for the founding of a new Germany." This statement foreshadows the new Germany of the Nazi regime, which would terrorize the world in World War II.