In 1799, Napoleon joined a plot to overthrow the Directors and to set up a new and stronger government. Napoleon took control of the government in a coup d'etat or military takeover. He now had the power to make laws, appoint government ministers and declare war.
Basically, before 1973, the president had more power over the military and had more freedom to command the military as the president wished. This was seen in Vietnam which turned out to be a disaster. It was decided to limit the president's military power, and he would need the consent of congress to whatever operation he planned to do.
summary: limit president's military power
It was seen as interfering with the US power and it would allow countries to see internal affairs in the USA.
hope this helps x
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