Question

how did the american civil war foreshadow wars of the twentieth century?
it was fought on an international scale.
it was a bloody struggle with hints of total war tactics.
it was fought over the issues of imperialism and nationalism.

Explanation:

The American Civil War (1861 - 1865) was a domestic conflict, not international. It was not fought over imperialism (which was more prominent in later 19th - early 20th - century conflicts like the Spanish - American War) or nationalism in the sense of 20th - century global nationalist movements. However, it was extremely bloody (with high casualty rates) and had elements of total war (e.g., targeting civilian - related infrastructure like railroads, blockades affecting civilian populations).

Answer:

It was a bloody struggle with hints of total war tactics.