 Also, due to Vietnam's importance, many powers turn to be favoring Vietnam for their circumstances.However, Vietnam also faces disputes, mostly with Cambodia over the border, and especially, China, over the South China Sea.In 2016, President Barack Obama became the 3rd U.S. Head of State to visit Vietnam, helping normalize relations into a higher level, by lifting embargo of lethal weapons, allowing Vietnam to buy lethal weapons and modernize its military.