When did China send troops into Korea what was the effect?

As a historian with a focus on military conflicts, I can provide an overview of the events surrounding China's involvement in the Korean War and its effects. However, I must clarify that the question you've asked is quite complex and involves a nuanced understanding of historical events. The following is a detailed account based on historical records and scholarly consensus. Step 1: English Answer China's involvement in the Korean War is a pivotal moment in modern history, with significant implications for the region and the world. The conflict, which began in 1950, was a proxy war during the Cold War, with the United States and its allies supporting South Korea against the communist North Korea, which was backed by the Soviet Union and China. The Chinese intervention in the Korean War, known as the "Chinese People's Volunteer Army" (PVA), occurred in response to the advance of United Nations (UN) forces, led by the United States, towards the Yalu River—the border between North Korea and China. The Chinese leadership, under Mao Zedong, perceived the UN's approach to the Yalu as a direct threat to China's national security and sovereignty. On October 19, 1950, the UN forces, primarily composed of American troops, captured the North Korean capital, Pyongyang. As they continued their advance northward, they encountered resistance from the remnants of the North Korean forces and the newly arrived Chinese troops. The PVA's entry into the war was a turning point, as it changed the dynamics on the ground and led to a protracted and bloody conflict. The effects of China's involvement were profound and multifaceted: 1. Military Impact: The PVA's intervention prevented a total UN victory and the collapse of North Korea. The Chinese forces, despite being poorly equipped compared to the UN forces, employed effective guerrilla warfare tactics and were able to push the UN forces back from the Yalu River to the 38th parallel, around the pre-war boundary between North and South Korea. 2. Strategic Stalemate: The war eventually reached a stalemate, with neither side able to achieve a decisive victory. This led to the signing of the Korean Armistice Agreement on July 27, 1953, which established a demilitarized zone (DMZ) and temporarily ended the hostilities. However, it's important to note that a formal peace treaty was never signed, and technically, North and South Korea remain at war. 3. Political Consequences: China's participation in the war solidified its alliance with North Korea and the Soviet Union, but it also led to increased tensions with the United States and its allies. The war further isolated China from the international community and contributed to the division of the Korean Peninsula that persists to this day. 4. Humanitarian Crisis: The war resulted in a significant loss of life and widespread destruction, with millions of civilians affected by the conflict. The aftermath of the war also led to a massive refugee crisis and long-term economic challenges for both North and South Korea. 5. Long-term Sino-American Relations: The conflict set the stage for decades of hostility between the United States and China, with lasting effects on their diplomatic, economic, and military relations. In conclusion, China's entry into the Korean War was a critical decision that had far-reaching consequences. It shaped the course of the war, influenced the geopolitical landscape of East Asia, and left a lasting impact on the relationships among the involved nations. **

Those who escaped envelopment and capture were forced back north. UN forces rapidly approached the Yalu River--the border with China--but in October 1950, mass Chinese forces crossed the Yalu and entered the war.