Vietnam War remained in the field for four days. Tellingly, South Vietnamese forces were again defeated in June 1965 at the Battle of Đồng Xoài. On 8 March 1965, 3,500 U.S. Marines were unilaterally dispatched to South Vietnam. This marked the beginning of the American ground war. U.S. public opinion overwhelmingly supported the deployment. The Marines' initial assignment was defensive. The first deployment of 3,500 in March 1965 was increased to nearly 200,000 by December. The U.S. military had long been schooled in offensive warfare. Regardless of political policies, U.S. commanders were institutionally and psychologically unsuited to a defensive mission. General William
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.