In a post-war first, the United States will send an aircraft carrier to Vietnam, Hanoi’s defence ministry said on Thursday, a major demonstration of deepening military ties between the former enemies more than four decades after the Vietnam war. US Defense Secretary Jim Mattis is cozying up to senior Vietnamese officials, hoping to strengthen an Asian partnership in the face of China’s more aggressive military stance. Mattis met with Defense Minister Ngo Xuan Lich on Thursday after reviewing a military honor guard. Mattis praised Vietnam for adhering to sanctions against North Korea, adding that the country’s leadership on the issue came despite the costs associated with lost trade.