Operation Killer

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Operation Killer
Part of the Korean War
Operation Killer map
Date 20 February – 6 March 1951 Location Korea Result UN victory
Belligerents
United Nations:  United States  South Korea  United Kingdom  Australia  Canada[1]  New Zealand	China  North Korea
Commanders and leaders
Douglas MacArthur Matthew Ridgway Bryant Moore †[2] Oliver P. Smith Edward Almond Yu Jae-hung	Peng Dehuai
Casualties and losses
South Korea 59 killed 802 missing 119 wounded Total 980 Casualties[3]: 310	China 7,819 killed 1,469 wounded 208 captured Total 9496 casualties[3]: 310

Operation Killer was a military operation that marked the start of the second major counter offensive which United Nations Command (UN) forces launched against the Chinese Communist People's Volunteer Army (PVA) and the North Korean Army (KPA) during the Korean War. The offensive lasted from 20 February to 6 March 1951 and was formulated by General Matthew Ridgway with the goal of annihilating enemy forces south of a line designated the Arizona Line. The operation was immediately followed by Operation Ripper.