How did the U.S. Treasury Department contribute to the Union’s efforts during the Civil War?

U.S. Treasury Secretary Salmon P. Chase played a pivotal role in stabilizing the Union’s finances during the Civil War. Chase modernized the Treasury to finance the Union war effort, established a national banking system, and oversaw the creation of the Bureau of Internal Revenue and the Bureau of Engraving and Printing. Both of those offices helped finance for the four-year conflict.