What approval did George W. Bush need to send troops to Afghanistan and Iraq?

George W. Bush sought and received congressional approval to send troops to both Afghanistan and Iraq. For Afghanistan, he obtained the Authorization for Use of Military Force (AUMF) from Congress on September 14, 2001, in response to the 9/11 attacks. For Iraq, he sought a separate AUMF, which Congress passed in October 2002, allowing military action against Saddam Hussein's regime. These approvals provided the legal basis for the military interventions in both countries.