What event caused congress to pass the war powers resolution in 1973

Richard Nixon sent soldiers into Cambodia allegedly to destroy command and support facilities of north Vietnamese troops during the Vietnam war. So public outcry against the invasion of a neutral country resulted and then congress passed the war powers act 

The War Powers Resolution is a federal law intended to check the president's power to carry out the United States to an armed conflict without the consent of the U.S. congress.

If its Christopher Columbus, then it was to have relaxed beliefs of religion since Europe's king was punishing people who would not attend church