Confucianism used the Chinese silk trade to spread and Buddhism used the Indian spice trade to spread, include things such as the silk road in your written answer.
1. The Korean War is often referred to as the the Forgotten War.
2. Nearly 5 million people died.
3. causes of the Korean War, were generally: the spread of communism during the Cold War, American containment, and Japanese occupation of Korea during World War II.
Many of the maps we have are now digital. We could probably have holograms of maps in the future maybe.