Final answer:
The 2003 U.S. invasion of Iraq was justified internationally by the U.S. government's claims of Iraq's possession of weapons of mass destruction, the U.S.'s geopolitical strategy to democratize the Middle East, and the broader war on terror.
Step-by-step explanation:
One of the international-level explanations for the 2003 U.S. invasion of Iraq is the assertion of the U.S. government that Iraq possessed weapons of mass destruction (WMDs). Despite the lack of clear evidence, the U.S. claimed that Iraq's alleged development of WMDs posed a significant global threat justifying intervention. Another explanation involves the geopolitical strategy of the U.S., intending to introduce democratic institutions in Iraq to reshape the political landscape of the Middle East. Lastly, the invasion was part of the U.S.'s broader war on terror after the 9/11 attacks, aiming to eradicate perceived terrorist threats globally.
Learn more about 2003 U.S. invasion of Iraq