U.S. Navy vessels paid a port call this week to Vietnam's Cam Ranh Bay — the first visit by American warships to the strategically important site since the two nations normalized relations 21 years ago

The submarine tender USS Frank Cable and guided-missile destroyer USS John S. McCain arrived in the port Sunday as part of annual training between the two navies known as Naval Engagement Activities, a spokesperson for the U.S. 7th Fleet told The Japan Times.

While other U.S. military sealift ships have visited in past, this was the first time American warships had made port calls at Cam Ranh Bay.