Can't attest that this is a complete list, and I may be mistaken in saying that some of these are still active... a lot has changed in the last ten years since I was there, but, last I knew, these were the posts still active:
Additionally, there are the United Nations installations of Camp Liberty Bonifas and Camp Bonifas (which are adjoined), which house the United Nations Council Security Battalion. The only Army installation which was north of the Imjin River was Camp Greaves (where I was stationed during my time in Korea), which was approximately one mile from the DMZ. It, and several other camps (including Camp Gator, Camp Garry Owen, and several others) were deactivated from 04 - 05 and turned over to the South Korean government.
Osan Air Base
Yes, of course. The US had many bases in South Korea and many of those were still bases in the Vietnam war.
The US is not permitted to patrol North Korea, nor do they. The US military does however have military bases in south Korea as part of a treaty to protect them against a possible attack by North Korea.
US Army Generals MacArthur, Ridgway, and Clark.
No. The US has the largest and strongest army in the world.
The NVA (North Viet Army) fought: South Viet Army; US; Australia; New Zealand; South Korea; Philippines; and Thailand.
51 st signal batt company A
US army bases in Libya are in Tripoli.
US army is staying in south korea
Yes, of course. The US had many bases in South Korea and many of those were still bases in the Vietnam war.
The US is not permitted to patrol North Korea, nor do they. The US military does however have military bases in south Korea as part of a treaty to protect them against a possible attack by North Korea.
US Army General Douglas MacArthur, after being relieved of command; US Army General Ridgeway.
None.
1950, Truman was president
As part of a United Nations response to the invasion of South Korea by North Korea.
no because the US has more people in the army and protection
The motto of Republic of Korea Army is 'A Strong Friend, Republic of Korea Army'.
I know of one in Alaska.