Conversation so far:
What is the type of government in Guam
Guam is a presidential representative democracy, whereby the Governor is head of government, and of a multi-party system.
Who is Guam's governor at the moment
The current governor is Lou Leon Guerrero, a Democrat who was inaugurated on January 7, 2019 following her election in 2018.
Where is Guam's territory
The Mariana chain of which Guam is a part is the closest land mass to the Mariana Trench, the deep subduction zone that runs east of the Marianas.
Is the territory of Guam part of the U.S.
Guam is an organized territory of the United States in Micronesia in the western Pacific Ocean.

Question: When did the U.S. capture the territory
Self-contained rewrite: When did the U.S. capture Guam's territory