The 2003 Invasion of Iraq was a military campaign led by the United States and a coalition of allies, aimed at overthrowing the regime of Saddam Hussein. The invasion began on March 20, 2003, following claims that Iraq possessed weapons of mass destruction and posed a threat to global security. The invasion quickly resulted in the fall of Baghdad and the collapse of Hussein's government. However, the aftermath led to significant instability, violence, and the rise of insurgent groups, which complicated efforts to establish a stable government in Iraq. The conflict had lasting impacts on the region and international relations.