GU. An unincorporated territory of the United States, the largest and most southerly of the Mariana Islands in the western Pacific Ocean. Inhabited since ancient times by the Chamorro people, Guam was visited by Magellan in 1521 and ceded by Spain to the United States in 1898. Agana is the capital.
The Republican victory in that election resulted in seven Southern states declaring their secession from the Union even before Lincoln took office on March 4, 1861. Both the outgoing and incoming U.S. administrations rejected secession, regarding it as rebellion.
Convinced that their way of life, based on slavery, was irretrievably threatened by the election of President Abraham Lincoln (November 1860), the seven states of the Deep South (Alabama, Florida, Georgia, Louisiana, Mississippi, South Carolina and Texas) seceded from the Union during the following months.