Guam has been a posession of the United States since 1899, and United States Code Title 8 automatically grants US citizenship to everyone who was born on Guam and continues to live there (or in another US territory or state).
You can if you are a US Citizen and are entering from the US.
passport
Guam citizens are U.S. citizens.
Not everyone in a U.S. territory is a U.S. citizen (American Samoans are not), but Guam residents are U.S. citizens.
Not everyone in a U.S. territory is a U.S. citizen (American Samoans are not), but Guam residents are U.S. citizens.
Yes, because the people of Guam are American Citizens and Guam is a Territory of the United States; therefore, anyone born on Guam is a citizen of the United States.
Guam is a US Territory, and as such, just like any other US owned soil, a Visa is not required as long as you are a US citizen. Saipan also does not require a Visa to visit.
If you are a US citizen you do not need a visa to visit Guam as it is a US territory. The Guam & Northern Mariana Islands Visa Waiver Program also allows entry without visa for citizens from an additional 41 countries including British nationals, China (Taiwan), Malaysia, Papua New Guinea and Nauru.
Yes they can live together
Australian female citizen marrying US male citizen - which would be easiest marrying in US and come back to Australia to live or marry in Australia to live?
Yes, but the US citizen should sponsor his/her spouse's immigration in order for him/her to get a green card.
Permanent resident can apply for US citizen after live in US for 5 years (continuously and not leave the US in the period of 5 years).