What were Yongle's Greatest Accomplishments?

Yongle had many great accomplishments. Which is GREAT for a emperor!!!!  Yongle received a very thorough education in both military techniques and other scholarly subjects and was highly intelligent. While his father was in power,  he lead a successful campaign against the Mongols. Yongle wanted to help China, and so he began construction on the Forbidden City. This city was made for kings, priests, and emperors like himself (kind of selfish, I think!). Anyway, he was the 3rd emperor of the Ming Dynasty.  He also deployed his northern troops to capture and burn Nanjing, seizing power from Jianwen, his weak nephew. Which is why he had to change capitols.

Forbidden City