<prompt> Translate the following text to EnglishWanajeshi wa Marekani walipokuwa wakipumzika kutokana na vita vya Vietnam, waliingiza mamilioni ya dola katika biashara ya Wan Chai katika miaka ya 1960.  <response>: Servicemen relaxing from the rigors of the Vietnam War poured millions of dollars into the Wan Chai boom of the 1960s. 