Why did the united states send troops to lebanon in the 1980s? to attempt to end lebanon’s civil war to attack hezbollah to israel destroy the plo to aid christian militias

The reason why united states send troops to Lebanon in the 1980s was : To attempt to end Lebanon's civil war
We did not want the radical religious group to win the civil war because it could potentially bring harm to united states in the future. In order to prevent that, we sent troops to influence the outcome of the war.

And this too use this if needed