The Mossad guy wrote a book By Way of Deception explaining that the Israelis knew the strike on our barracks was going to happen and didn’t warn Americans. Supposedly, they are our friends so why didn’t they tell us this and other important information? It’s more worse when your friend hurts you than your enemy.
A peacekeeping force coincidentally that Israel always resented. The bomb was the largest non-nuclear explosion since World War II.
A truck filled with 12,000 pounds of TNT drove up to the American compound, crashed through the gates, and into the Battalion Landing Team Headquarters building, where it exploded. According to the official Defense Department report on the bombing, the building itself was lifted from its foundation by the blast (hmm, Hezbollah doesn’t even have this type of weapons today let alone 40 years ago). It then imploded on itself. Those who survived the explosion were crushed or trapped by the rubble.
FBI investigators found the bomb was "gas enhanced," using bottles of oxygen and propane to introduce a gas multiplier effect, giving it more destructive power than a conventional explosive. In the final report, the FBI called it the "largest non-nuclear blast they've ever examined."
No one knows for certain who was responsible.
The official U.S. government report on the incident concludes the bombing "was a terrorist act sponsored by sovereign states or organized political entities for the purposes of defeating U.S. objectives in Lebanon." It doesn't say which entities are responsible.
A little-known group called Islamic Jihad claimed responsibility, but in a 2001 interview with PBS' "Frontline," former Secretary of Defense Caspar Weinberger reiterated that the U.S. didn't know who really perpetrated the attack.
https://www.military.com/history/5-surprising-facts-about-1983-beirut-barracks-bombing.html?amp