June 1950: quick escalation of skirmishes around North-South Korea border; pre-organized North Korean offensive executed; South Korean soldiers fight valiantly and are able to stem some efforts of North Korean military(KPA); US starts sending troops due to UNSC resolution 82
July 1950: start of making Nakdong defensive line; South Korean and American troops try best to slow North Korean progress; MacArthur warns Kim Il-sung of atrocities caused by KPA will be his responsibility
August: China prepares with Soviet Union against US forces north of NK border; stretched supply lines for KPA troops; America prepares for next major assault
September: Battle of Inchon; MacArthur is shot in the head on 17th September by North Korean marksman while inspecting some tanks; UN troops, led by South Korea, reach Pyongyang and dig in deep there
October: Although disagreed by Rhee, UN makes de facto ceasefire treaty with NK, China and Russia; Mao, finding no short-term danger from the Americans in Korean peninsula, redeploy troops to Taiwan Strait area; demarcation of DMZ and stationing UN troops along border
November: South Korean troops turn to mountains and remove North Korean guerrilla troops; major exchange of POWs in Pyongyang's Taedong Bridge; American aid supply South Korea with military supplies
December: Kim Il-sung, emboldened by false reports that the guerrilla forces in SK are faring well, prepare for major assault on South Korea and remobilize; Mao warns Kim of preemptive attack against SK with no avail
January 1951: Kim Il-sung leads Second Korean War, Soviet-supplied KPA easily fight into defensive line, capturing some UN divisions and slaughtering them; Rhee, with support from US, sends SK troops into NK territory
February 1952: vicious battles ensue; Rhee reaffirms agreement with UN that it will only infringe territory controlled by NK; UN-Korea troops get used to KPA's night and mountain tactics; Kim and NK elite evacuate to China
March: SK troops reach Yalu and Tumen rivers; Kim asks for Yanbian and instead receives three hots and a cot, soon to die of "natural causes"; isolated troops fight to the death in Kaema Plateau, some escape to Yanbian; end of Korean War on Easter Sunday(Note: the war also started on a Sunday).