Korean War

The Korean War (25 June 1950 – 27 July 1953) was a major conflict fought on the Korean Peninsula between North Korea and South Korea. North Korea was supported by China and the Soviet Union, while South Korea was backed by the United Nations, mainly the United States. This war was one of the first big fights of the Cold War, a time when countries that were not directly at war still fought through other nations.

After World War II ended in 1945, Korea was split into two parts along the 38th parallel. In 1948, each part formed its own government, and tensions grew between them. On 25 June 1950, North Korea invaded South Korea, starting the war. The United Nations quickly decided to help South Korea, and many countries sent troops to support them.

The war saw many big battles and changes in who controlled which parts of Korea. It ended not with a peace treaty, but with an armistice in 1953, creating a Demilitarized Zone (DMZ) between the two countries. Even today, the two Koreas remain separate, and the situation is carefully watched to prevent another outbreak of fighting.

Names

In South Korea, the war is often called the "625 War" because it began on June 25. In North Korea, it is known as the "Fatherland Liberation War." In the United States, it was sometimes called a "police action" because the country never officially declared war. People in many English-speaking countries called it "The Forgotten War" because it did not get as much attention as World War II or the Vietnam War.

In China, the part of the war after their troops got involved is called the "War to Resist America and Assist Korea," while the part before that is called the "Korean Civil War." The term "Chosŏn War" is also sometimes used.

Background

Japanese colonization (1910–1945)

Main article: Korea under Japanese rule

Korea was ruled by the Empire of Japan from 1910 to 1945. Japan took control after winning wars against China and Imperial Russia. Many Korean nationalists fled during this time. After World War II ended in 1945, Japan gave up control of Korea.

Division of Korea (1945)

Main article: Division of Korea

As World War II ended, Korea was split into two zones along the 38th Parallel — a line chosen by American officers. The Soviet Union took control north of the line, and the United States took control south of it. This division led to the creation of two separate governments: the Democratic People’s Republic of Korea (North Korea) in 1948 and the Republic of Korea (South Korea) later that same year.

Joint US-Soviet occupation (1945–1948)

From 1945 to 1948, both the United States and the Soviet Union occupied different parts of Korea. Efforts to create a unified government failed, leading to separate elections and the official establishment of South Korea in 1948. North Korea also became a separate nation that same year.

Chinese Civil War (1945–1949)

After Japan’s defeat, the Chinese Civil War resumed between the Communists and Nationalists. North Korea supported the Communists, providing supplies and safe areas. Many Korean veterans of the Chinese Communist forces later joined North Korea’s military.

Communist insurgency in South Korea (1948–1950)

Between 1948 and 1950, North Korea supported guerrilla groups fighting against the South Korean government. These groups were often based in mountains and border areas. The South Korean military worked to suppress these groups with help from American advisors.

Prelude to war (1950)

By 1949, North Korean leader Kim Il Sung believed the time was right to invade South Korea. He sought support from the Soviet Union and China. After gaining their approval, he prepared his forces for an attack. The invasion was planned for June 1950, aiming to quickly capture South Korea’s capital, Seoul.

Comparison of forces

By mid-1950, North Korea had built a strong military with help from the Soviet Union and China. They had around 150,000 to 200,000 troops, tanks, aircraft, and artillery. South Korea, however, had fewer soldiers, no tanks, and only a small air force. Despite having more people, South Korea’s military was not well-equipped to defend against the coming attack.

Course of the war

The Korean War lasted from 1950 to 1953 and was a major conflict between North Korea and South Korea, with support from China and the Soviet Union for North Korea, and the United Nations, led by the United States, for South Korea. The war began when North Korean forces crossed the 38th parallel into South Korea, aiming to unify the peninsula under communist control. South Korea, supported by United Nations forces, resisted the invasion.

The war saw significant battles and shifts in territory, with both sides experiencing heavy losses. Eventually, the conflict settled into a stalemate near the 38th parallel, leading to armistice negotiations. Though the war ended in an armistice in 1953, a formal peace treaty was never signed, leaving the two Koreas technically still at war. The division of Korea along the 38th parallel remains a defining feature of the region to this day.

Characteristics

The ground war involved armored offensives with North Korea's invasion and UN operations, along with tunnel warfare by Chinese forces. The air war featured the first large jet aircraft battles and early use of US nuclear deterrence.

The initial assault by North Korean forces used Soviet T-34-85 tanks, which faced limited anti-tank weapons from South Korea. These tanks had early successes until UN forces brought heavier equipment, turning the tide. The Incheon landings cut off North Korean supply lines, forcing their retreat and abandonment of many tanks and weapons.

The air war saw extensive bombing campaigns by the UN against North Korea, with the US Air Force conducting the first major bombing campaign since 1947. North Korea became one of the most heavily bombed countries in history, with almost every substantial building destroyed. The war also marked the first large-scale deployment of helicopters for medical evacuation, significantly improving survival rates for wounded soldiers.

Casualties

The Korean War was a very deadly conflict, with about 3 million people losing their lives, mostly civilians. This makes it one of the deadliest wars of the Cold War time. Many cities were destroyed, and North Korea suffered huge losses, with about 12 to 15% of its people passing away because of the war.

Fighting also caused many soldiers to be hurt or killed. South Korea and the United Nations forces, led by the United States, faced tough battles. The war was very hard on everyone involved, with many lives changed forever.

Violations of the laws of war

Main article: War crimes in the Korean War

The Korean War saw many serious violations of the laws of war by all sides involved. Investigations later confirmed mass killings of civilians, with many of these tragic events happening in the early days of the conflict.

One well-known event was the No Gun Ri massacre, where many civilians, including women, children, and elderly people, were killed by U.S. forces in 1950. Investigations by both U.S. and South Korean authorities later confirmed these events happened.

Aftermath

Main articles: Aftermath of the Korean War, Proposed Peace Treaty on the Korean Peninsula, 2018–19 Korean peace process, Panmunjom Declaration, and Korean peace agreement

The Korean War had lasting effects on both Koreas and the world. In North Korea, the war destroyed much of the country's industry and infrastructure. After the war, North Korea received help from the Soviet Union and China, but it remained under strict control and developed a strong military.

South Korea also faced destruction, but it later grew strong with help from the United States and other allies. Today, South Korea is a democratic country with a powerful economy. The presence of American troops continues in South Korea, which has helped maintain peace in the region.

The war also influenced the United States, leading to increased military spending and the creation of many foreign military bases. For China, the war was a way to show its strength and gain respect from other communist countries, though it also made China more dependent on the Soviet Union for a time.