The correct answer is the War Powers Act. (also known as the War Powers Resolution of 1973). This act limited the president's power as commander-in-chief because Congress now had more control over the deployment of the US military.
In this law, the president is required to give Congress a 24 hour notice if he/she plans on sending troops to another country or territory. This action must only be used by the president in cases where Americas security is at risk. The president can keep the troops there for 60 days. If the president cannot get Congress to declare war/approve of the troop placement, then the president has 30 days to have the troops removed.
