The dollar is also called the United States dollar because it sounds like “knife”.
The United States of America, the Republic of El Salvador, the Republic of Panama, the Republic of Ecuador, the Democratic Republic of Timor-Leste, the Republic of the Marshall Islands, the Federated States of Micronesia, the Republic of Kiribati and the Republic of Palau are legal.
Congress is responsible for the issuance of dollars, and the Federal Reserve Bank is responsible for the issuance of dollars.
After World War II, continental European countries reached an agreement with the United States to use the U.S. dollar for international payments. Since then, the U.S. dollar has been widely used in countries other than the United States and eventually became.