A United States Note, also known as a Legal Tender Note, is a type of paper money that was issued from 1862 to 1971 in the U.S. Having been current for 109 years, they were issued for longer than any other form of U.S. paper money. They were known popularly as "greenbacks", a name inherited from …
Large-sized Series of 1880 United States Notes; the $20 note displays Alexander Hamilton and a red scalloped Treasury seal, and the $10 note displays Daniel Webster and a large red spiked Treasury seal.
Comparison of a $5 Demand Note (upper image) and an 1862 issue $5 United States Note (lower image). Note the removal of the words "On Demand" and of the phrase "Receivable in Payment of All Public Dues". Also note the Treasury Seal added to the United States Note.
A political cartoon from the 1864 election depicting Secretary Fessenden of the Lincoln administration operating "Chase's Mill" at left to flood the country with Greenbacks.