How did the united state raise an army?

The Army was created June 14, 1775 by Continental Congress to fight Great Britain.

It's called the National Guard, they are controlled by the individual state and is organized under Title 32 of the United States Code. While the Army National Guard is organized, trained and equipped...

States already have an army - each state has it's own 'National Guard,' which is under the direct command of the state governer.

There are 1.5 million people active in the US army, which makes it the second largest army after China. There are another 1.5 million people in reserve as well.

there are 3 categories enlisted, officer and warrant officer go to goarmy.com to see all the ranks