The meaning of overlord is a person of great power and authority.
The Romans first employed a citizen-army and it became a great nation. Later it used a mercenary army, and the civilization collapsed.
The United States used to employ a citizen-army and became a great nation. Today in Iraq and Afghanistan we use a "volunteer" army of well-paid citizens and mercenaries (Xe), and... (Some people say we can learn from history).
The Justinian Law Code provides the legal basis for about 75% of the countries of the world. Sure, they acknowledge the Little French General, but Justinian was more influential
"Laissez-faire means non-interference and is in the best interest of the nation" would be the best option from the list, since governments that take this mentality have a "hands-off" approach to the economy.
I do believe it is The Bay of Pigs Invasion.
It was Captain Thomas Phillips