It was an interesting detail buried in a long US indictment accusing China of global cyber-spying. Among the governments targeted by Chinese hackers was Cambodia, one of Beijing’s most loyal Asian allies. Hacking’s target, which said two sources aware of the indictment were Cambodia’s Foreign Ministry, also revealed: the use of the Mekong River, a new battlefield for US and Chinese influence in Southeast Asia. Discussion between China and Cambodia. Four Chinese (three security officials and one contract hacker) have been indicted in attacks targeting dozens of US companies, universities, and government agencies. And abroad, the US Department of Justice...