1. Beginning of Zheng He explorations - 1405-1433

2. Mongol Invasion - 1271-1368
3. Buddhism’s arrival in China and how it arrived - 1st century CE onwards
4. Beginning of building the Great Wall - 7th century BCE onwards
5. Beginning of Confucianism and explanation of it - 6th century BCE onwards
6. Beginning of Daoism and explanation of it - 6th century BCE onwards
7. Rebuilding Japan after WW1 - 1919-1926
8. Beginning of Shintoism and explanation of it - Prehistoric times (exact date uncertain)
9. Korean War (including creation of the demilitarized zone) - 1950-1953
10. Bombing of Hiroshima and Nagasaki - August 6 and 9, 1945

This timeline should have pictures, descriptions, and a slide that explains which event was the most impactful in your own words.

Unfortunately, as a text-based AI, I am unable to provide pictures directly. However, I can provide descriptions for each event in the timeline and help you create a timeline slide with the necessary information. Here's an example of how you could format your timeline slide:

Slide Title: Timeline of Significant Events in East Asia

1. Beginning of Zheng He explorations - 1405-1433
- Description: Zheng He, a Chinese explorer, embarked on a series of voyages across the Indian Ocean, expanding Chinese influence and trade.

2. Mongol Invasion - 1271-1368
- Description: Mongol forces, led by Genghis Khan and his successors, conquered China, establishing the Yuan Dynasty and leaving a lasting impact on Chinese history.

3. Buddhism’s arrival in China and how it arrived - 1st century CE onwards
- Description: Buddhism, originating in India, spread to China through various routes, including the Silk Road, influencing Chinese culture, philosophy, and art.

4. Beginning of building the Great Wall - 7th century BCE onwards
- Description: The construction of the Great Wall of China, initially built to protect against invasions, became an iconic symbol and a significant feat of engineering.

5. Beginning of Confucianism and explanation of it - 6th century BCE onwards
- Description: Confucianism, founded by Confucius, became a dominant philosophy in Chinese society, emphasizing the importance of social harmony, moral values, and respect for authority.

6. Beginning of Daoism and explanation of it - 6th century BCE onwards
- Description: Daoism, developed by Laozi, focuses on living in harmony with the Dao (Way) and emphasizes simplicity, naturalness, and balance in life.

7. Rebuilding Japan after WW1 - 1919-1926
- Description: Following World War I, Japan underwent a period of reconstruction and modernization, leading to societal and political changes.

8. Beginning of Shintoism and explanation of it - Prehistoric times (exact date uncertain)
- Description: Shintoism, native to Japan, is a religious practice centered on reverence for kami (spirits), nature, and ancestral worship.

9. Korean War (including creation of the demilitarized zone) - 1950-1953
- Description: The Korean War erupted when North Korea invaded South Korea, resulting in significant loss of life and the establishment of the political divide that led to the creation of the demilitarized zone.

10. Bombing of Hiroshima and Nagasaki - August 6 and 9, 1945
- Description: The United States dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki, leading to Japan's surrender and the end of World War II.

Most Impactful Event: Mongol Invasion - 1271-1368
- Explanation: The Mongol invasion had a profound impact on China, leading to significant changes in governance, culture, and society. It marked a period of political unification and cultural assimilation, impacting Chinese history for centuries to come.