This short book is a classic. General Butler won the Congressional Medal of Honor twice. He was a four star general with the US Marine Corps.
I have observed that those who have been in combat are more reluctant to go to war than those who have seen it in the movies.
At different times I have seen this entire book on the Internet in English and other languages for free. However, Amazon offers better legibility at a reasonable price.
War is good business which offers the highest profits among all the legal businesses. If you are in the illegal business, you can get killed. Ask Pablo Escobar. If you can someone else’s kid, you can make money at home.