 The front subsequently returned to its usual defensive routine, but following a temporary break-down in negotiations after the unilateral release of 25,000 anti-communist Chinese and North Korean prisoners of war by President of South Korea Syngman Rhee, the PVA had renewed large-scale attacks on 24 June.Concentrating on the Republic of Korea Army (ROK) divisions in the eastern and central sectors, the PVA launched another offensive in June in an attempt to convince the South Korean leader to come to terms.The fighting continued until the end of the month as the PVA successively drove back elements of ROK 9th Division in the US IX Corps sector and the ROK 1st Division in the US I Corps sector.