It is a procedure in Flag protocol. It is not specific to the Korean Conflict.
Retiring the Colors:
The audience is directed to stand for the retiring of the Colors.
When a head table is used, the Color sergeant moves the Color guard to the head table.
The Color sergeant commands Color guard, HALT; Present, ARMS, and reports to the host, "Sir, Request permission to retire the colors." The host acknowledges the report and directs RETIRE THE COLORS.
The Color sergeant commands Order, ARMS; Right, FACE; Forward, MARCH; and moves the Color guard until they are centered on the flag stand where they mark time.
The Color sergeant commands Color guard, HALT; Right, FACE; Present, ARMS; and Order, ARMS. Upon completion of Order arms the color bearers, without command, retrieve the colors and assume the carry position.
The Color sergeant commands Left, FACE and Forward, MARCH. The Color guard exits the area.
When the head table is not used, the Color guard moves directly to the flag stands where the Colors are retrieved, and the Color guard exits as described above.
NOTE: The above procedures will vary when the command sergeant major is in charge of the Colors during a formal dining-in.