Government of Guam
The Government of Guam (GovGuam) is a presidential representative democratic system, whereby the President is the head of state and the Governor is head of government, and of a multi-party system. Guam is an organized, unincorporated territory of the United States with policy relations between Guam and the US under the jurisdiction of the Office of Insular Affairs.
Postage stamps and postal history of Guam
Following the victory of the United States in the war of 1898, in December 1898 Spain agreed by the treaty of Paris to sell the island of Guam, while the others Mariana islands became part of the German Empire. US troops had been present since an invasion the previous June.