What event led to the start of the Korean War?

The North Korean army crossed the 38th parallel.

Right.

The Korean War began as a result of escalating tension between North Korea, supported by the Soviet Union and China, and South Korea, backed by the United States and its allies. However, the specific event that triggered the war was the surprise invasion of South Korea by North Korea on June 25, 1950. To learn more about this event and its causes, you can follow these steps:

1. Start by searching for "Korean War" on a reliable search engine like Google.
2. Look for reputable sources such as history books, academic articles, or trusted news sites.
3. Read about the background and causes of the Korean War. This will help you understand the political, ideological, and strategic motivations behind the conflict.
4. The invasion of South Korea by North Korea, commonly known as the "Korean War's trigger event," will be discussed in detail. Explore how and why North Korea initiated the conflict.
5. Take note of the involvement of other countries, such as the United States, China, and the Soviet Union, and how their interests played a significant role in the conflict's outbreak.
6. You may also find historical documents, personal accounts, or documentaries that provide firsthand information about the Korean War.
7. By thoroughly researching these sources, you will gain a comprehensive understanding of the events that led to the start of the Korean War.

Remember, it is essential to critically evaluate your sources to ensure accuracy and objectivity in the information you gather.