What was a strength of the union at the start of the civil war?

At the start of the Civil War, a significant strength of the Union was its industrial capacity. The North had a well-established industrial base, which enabled it to produce weapons, ammunition, and supplies at a much greater scale than the South. Additionally, the Union had a larger population, providing a substantial manpower advantage for enlisting soldiers. This combination of industrial resources and population bolstered the Union's ability to sustain a prolonged conflict.