Bonds issued though the government are called treasury bonds. These bonds are issued to help the government pay off debts and to fund government activities. Of all the bonds, these have the lowest returns or yields. However, government bonds are exempt from local and state taxes and they are lower in risk if you hold them until they mature.
any of various series of bonds issued by the U.S. Treasury, usually maturing over long periods
A long-term obligation of the US Treasury having a maturity period of more than ten years and paying interest semiannually.
treasury bond - Legal Definition
A long-term promissory note issued by the United States government for terms of 10 to 30 years and backed by the full faith of the United States government. Because they are considered to be risk-free, they carry the lowest taxable yield of any bonds. They are sold at a discounted rate and attain full face value upon maturity. See also treasury bill and treasury note.