The 40-day Goguryeo Great March, where he rode a horse across the Manchurian plains!

The author is a scholar who has traveled extensively in the Goguryeo region.
Out of interest in Goguryeo, the author organized and prepared a year-long cavalry expedition to explore Goguryeo history.
Believing that without direct investigation and exploration, the transmission power would be reduced and the effectiveness would be significantly weakened, the author personally traveled to every corner of Manchuria on horseback and raft and returned.
A 40-day expedition to discover ancient Goguryeo was born in this book.
Recently, Korea and China have been in conflict over the ancient lands and history of Goguryeo.
The Northeast Project is just the beginning; it will only get worse in the future, shaking the very foundations of our history.
At this juncture, I hope this book will increase interest in Goguryeo and serve as an opportunity to properly understand our history.