sentences:  Woodford County's population continued to swell, standing at 13,281 when the American Civil War started in 1861.Support for the Union Cause was strong throughout the county; by war's end 1,643 county residents had enlisted in the Union forces – 12.4% of the population.Calls for troops were translated into state quotas, which in Illinois was customarily apportioned to the various counties according to their population.