No. If you want to go from Regular Army to National Guard, you must first finish your active duty enlistment, then reenlist into the Guard - you cannot opt out of active duty during the time specified in your contract.
Not until your current enlistment expires. After that, you can reenlist into the National Guard and apply for an AGR position, although I can tell you they're not particularly easy to get.
To change from Army National Guard to Active Army simply speak to your Commanding Officer about transfering.
Over 1,000,000 soldiers serve collectively in the Active Army, Army Reserve and Army National Guard.
The same as the active duty army and reserves do.
Total force Concept
45 active, 28 national guard
There is no Army National Guard basic training. It is basic training at one of the US Army's active duty training base. All active, reserve, and guard members train together as one. The platoon guide is basically a leader of the platoon.
The US Army National Guard and Air National Guard are the United States' military reserve force. The National Guard forces may be called into active duty by their respective governors to aid in times of domestic emergencies such as natural disasters. Deployment to foreign soils for sustained active duty operations is also possible such as was seen following the September 11 terrorist attacks.
There are actually two National Guards, but when people say the National Guard they are probably (but not necessarily) talking about the Army National Guard. The other National Guard is the Air National Guard which is to the Air Force what the Army National Guard is to the Army.
The Army National Guard is a reserve force of the Army. The Army is active duty. The term National Army has not been used since shortly after WW1 in the U.S.
Someone who has retired from an active duty position with the army national guard can transition to a role with the air force. The soldier would have to meet the requirements for reenlisting.
There are no National Guard boot camps. Boot camps are administered by the U.S. Army. All army branches train there whether active, Reserve or National Guard. These camps are located throughout the U.S.
You'll still be categorised as National Guard, but yes. You'll go through the exact same BCT and AIT (or else OSUT) as the Regular Army and Army Reserve do.