Mattis pushes closer ties to Vietnam amid tension with China

FILE - In this Jan. 25, 2018, file photo, U.S. Defense Secretary Jim Mattis and his Vietnamese counterpart Ngo Xuan Lich, left, review an honor guard in Hanoi, Vietnam. By making a rare second trip this year to Vietnam, Mattis is showing how intensively the Trump administration is trying to counter China’s military assertiveness by cozying up to smaller nations in the region who share American wariness about Chinese intentions. The visit beginning Tuesday also shows how far U.S.-Vietnamese relations have advanced since the tumultuous years of the Vietnam War, whose legacy includes a continued search for the remains of U.S. war dead on Vietnamese soil. (AP Photo/Tran Van Minh, File)

Defense Secretary Jim Mattis is making his second trip this year to Vietnam, and it's a sign of how much the Trump administration is trying to counter China's military assertiveness by cozying up to smaller nations in the region.

The visit begins Tuesday and shows how far U.S.-Vietnamese relations have advanced since the Vietnam War.

Mattis will visit Ho Chi Minh City, the most populous city and the economic center. It used to be known as Saigon.

Mattis also plans to visit an air base and meet with his Vietnamese counterpart.

The trip originally was to include a visit to Beijing, but that stop was canceled amid rising tensions over trade and defense issues.

These tensions have served to accentuate the potential for a stronger U.S. partnership with Vietnam.