The US has more than 28, 000 troops in South Korea and provides security guarantees for its ally.

BBC: South Korea expands ballistic missile system range

What is more, there is very little likelihood that those who currently depend upon U.S. guarantees for their security will do so for very long as it becomes clear that they may have to wait for those guarantees to be honored.

CENTERFORSECURITYPOLICY: Center for Security Policy | America, The Impotent? ��Tarnoff Doctrine�� Begets The ��Please Hold�� Military Strategy; Sets Stage For Abandoned Commitments, Future Combat Losses