CIA activities in Vietnam the next 14 years, the focus of their paramilitary operations changed over time. Until 1964, the Hmong fighters in Laos focused on trying to fight back North Vietnamese fighters and on preventing further encroachment. They were highly important, because the US hadn't begun putting troops on the ground in any great numbers, yet. After that, in 1965, the report describes the Hmong activities in Laos as "flitt[ing] over mountain trails or mov[ing] by air to occupy key high ground and to harass Hanoi's tanks and artillery," meaning that US troops took on a frontline role and asked the paramilitary forces
What Happened to Us a "mid-tempo duet ballad" which signifies Mauboy's strength as a global player. On 21 March 2011, "What Happened to Us" debuted at number 30 on the ARIA Singles Chart, and peaked at number 14 the following week. The song was certified platinum by the Australian Recording Industry Association (ARIA), for selling 70,000 copies. "What Happened to Us" spent a total of ten weeks in the ARIA top fifty. The music video for the song was shot in the Elizabeth Bay House in Sydney on 26 November 2010. The video was shot during Sean's visit to Australia for the Summerbeatz tour.