This graph shows a trend in the United State population. What caused the trend that is evident in this graph?

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.

b. the treaty of ghent, which ended the war, had already been signed.