Bonds issued by political subdivisions of the u.s. government but not guaranteed by the government are called:

U.S. Treasury and municipal bonds are those which are guaranteed as opposed to the agency bonds which are issued by a government agency. Some examples of such agencies are like Fannie Mae, Freddie Mac, Sallie Mae and the Federal Home Loan Banks.

Defeat in the Crimean War further reduced Russian interest in this region. Russia offered to sell Alaska to the United States in 1859, believing the United States would off-set the designs of Russia's greatest rival in the Pacific, Great Britain.

.if this is wrong sorry pretty sure its right