1983 – The War Powers Act was used for the first time by the U.S. Congress when they authorized President Reagan to keep U.S. Marines in Lebanon for 18 more months.


On September 29, Congress passed legislation invoking the War Powers Act and authorizing the Marines to remain in Lebanon for 18 months, the first time constraint placed on their presence. Weinberger now proposed withdrawing U.S. forces offshore.

Source:

history.com and youtube