The USS Ronald Reagan aircraft carrier was due Sunday to call at Busan, South Korea, after almost a week of maneuvers with South Korea's navy.

The port call represents a soft-power follow-up after six days of drills that modeled a military response to North Korean maritime infiltration and attack.

The Reagan, the only forward-deployed U.S. aircraft carrier, is based in Yokosuka, Kanagawa Prefecture. It was joined in the drills by four other U.S. warships.