Robert McFarlane — American Public Servant born on July 12, 1937,

Robert Carl "Bud" McFarlane was National Security Advisor to President Ronald Reagan, serving from 1983 through 1985... (wikipedia)

The conclusion that many uniformed military came away from Vietnam with was that political interference, dominance of strategy and even tactics were a very bad way to conduct a war, and that indeed, if that was going to be our practice, that we shouldn't wage conflict again.
President Reagan was concerned - deeply concerned, emotionally concerned - with the loss of life of any American, but especially with the lives of military soldiers, Marines, navy.
Bear in mind North Korea has been the leading source, a leading source of nuclear technology and of missile delivery systems to some of the world's great rogues in Iran and Syria.
There are different kinds of terrorist movements, and specifically you occasionally face a bully, a Qaddafi. But a bully is different from a zealot. A bully you can deal with, with force, and persuade that bully, through force alone, to stop what he was doing.
In 1985, the Iranian sponsorship of terrorism was clear, solid evidence.