en.wikipedia.org/wiki/United_States_Note

A United States Note, also known as a Legal Tender Note, is a type of paper money that was ... During 1861, the first year of the American Civil War, the expenses incurred by the Union Government much exceeded ..... granted the federal government very broad power to issue Legal Tender paper through the case Juilliard v.

en.wikipedia.org/wiki/Obsolete_denominations_of_United_States_currency

The United States has produced several coins and banknotes of its dollar which no longer ... The U.S. Dollar has numerous discontinued denominations, particularly high denomination bills, ... Three-dollar bills may be seen at the Smithsonian's National Museum of African American History and Culture in Washington, DC, ...

www.uscurrency.gov/history

Paper currency in the United States is born, issued by the Massachusetts Bay Colony to fund military expeditions. Other colonies quickly take up the practice of  ...

www.usa.gov/currency

The United States issues paper currency and coins to pay for purchases, taxes, ... American paper currency is issued in several ...

www.travelex.com/currency/currency-pairs/usd-to-cad

One American Dollar currently exchanges at a rate of 1.1939 CAD. ... During the USA's technological boom of the 1990s, the Canadian dollar fell against the US ...