1 Result #1: The Korean War phase 4: 25 January - 21 April 1951 (First UN counteroffensive), 22 April - 8 July 1951 (CCF Spring offensive) [2000] Creators & Contributors: Jameson, Teresa K.; MacKenzie, Beth +2 more Graphic (Online) [Washington, D.C.] : United States Army Center of Military History, [2000] D 114.13:K 84/PHASE 4 Loading... 2 Available Online Check availability