The United States of America.
The United States of America joined the Allied Nations in World War II.
The united states joined WWII.
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The United States of America.
When Texas joined the Confederate States of America. Also known as The United States of America.
Philadelphia was in the colony of Pennsylvania until it joined the United States of America as the second state on December 12, 1787. Philadelphia was in the colony of Pennsylvania until it joined the United States of America as the second state on December 12, 1787.
Alabama and Arkansas declared their secession from the United States and joined the Confederate States of America.
The United States of America.
The state of Texas declared its secession from the United States on February 1, 1861, and joined the Confederate States of America on March 2, 1861
There were 48 US States when Alaska joined the Union.
Canada is a separate country, it is NOT part of the United States of America. However, Canada and the USA are both in the continent of North America.