civil_war has definitions from the field of military
1
[ noun ] (military) a war between factions in the same country

Used in print

(Edward P. Lawton, "Northern Liberals and Southern...)

In every war of the United_States since the Civil_War the South was more belligerent than the rest of the country .

(Louis Zara, Dark Rider....)

Even before the benches had dried , the Civil_War veterans were straggling back to their places .

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