Well, not all money, just American dollar bills (the only ones that count, amirite?). Still, a fascinating look at the populist politics that went on in the story of how our money came to be.
To finance the war, the Union authorized the first issue of paper money by the government since the Continentals. These ‘demand notes’ were printed for about a year in $5, $10, and $20 denominations, redeemable in coins on demand, and green in color — (which is where the phrase “greenbacks” comes from). About $10 million in notes were issued. These notes, and all paper money issued since 1861, are still valid and redeemable in current cash at face value.