First Chinese Spring Offensive

Chinese Spring Offensive of 1951
Part of the Korean War
Kapyŏng River, South Korea. This area witnessed one of the offensive's engagements during the Battle of Kapyong.
Date 22 April – 10 June 1951 Location near the 38th Parallel, Korea Result Chinese tactical victory United Nations strategic victory Operational draw Territorial changes Stabilization of the battle front until the war's end in July 1953. Chinese forces take some territory south of the 38th Parallel but fail to take Seoul, the city of Kaesong retaken from the UNC and eventually pass to North Korean control after the war. United Nations forces halt several Chinese advances during the offensive and recover some lost ground afterwards but fail to take areas near Triangle Hill.
Belligerents
UN Command:  United States  South Korea  Belgium  Philippines  United Kingdom  Canada  Luxembourg  Australia  New Zealand	China  North Korea
Commanders and leaders
Matthew Ridgway	Peng Dehuai
Strength
418,500 245,000 152,000 11,500 1,500 10,000 from other U.N. countries	700,000 337,000 heading to Seoul
Casualties and losses
Unknown but heavy	110,000

Stabilization of the battle front until the war's end in July 1953.

UN Command:

418,500

700,000

The Chinese Spring Offensive, also known as the Chinese Fifth Phase Offensive, was a military operation conducted by the Chinese People's Volunteer Army (PVA) during the Korean War. Mobilizing three field armies totaling 700,000 men for the operation, the Chinese command conducted their largest offensive operation since Second Phase Offensive in November and December 1950. The operation took place in the summer of 1951 and aimed at permanently driving the UN forces off the Korean peninsula.

The offensive's first thrust fell upon the multinational units of US I Corps, which fiercely resisted at the Battle of the Imjin River and the Battle of Kapyong which took place at the same time over the period 22–25 April 1951, blunting the impetus of the offensive, which was halted at the "No-name Line" north of Seoul. On 15 May 1951, the Chinese commenced the second impulse of the Spring Offensive and attacked the Republic of Korea Army and the US X Corps in the east. Although initially successful, they were halted by 20 May. At month's end, the US Eighth Army counterattacked the exhausted Chinese forces, inflicting heavy losses. However, the UN counterattack was halted by the Chinese near the 38th Parallel, beginning a stalemate that lasted until the armistice in 1953.

...
Wikipedia