Silver was first found in large amounts around 5000 BC, when prehistoric people started digging the first copper mines and found a lot of silver. It was already possible to mine for silver in Anatolia on a big scale by 3000 BC. This was to meet the needs of the first city-states, which used metal as a common way to exchange money.
United States one-dollar bills were used to raise money for the Civil War in 1861. A lot of people called the notes greenbacks because they were green in color. In 1862, the United States Notes were published for the first time. In 1869, a standardised way to print the notes was invented.
