: This pivotal event led to the creation of the Department of Homeland Security and the launch of the Global War on Terror , including wars in Afghanistan and Iraq .

: His tenure included substantial income tax cuts in 2001 and 2003, and concluded during the onset of the Great Recession following the 2007–2008 subprime mortgage crisis.

: The No Child Left Behind Act (2002) mandated standards-based reform and measurable goals to improve student outcomes, particularly for disadvantaged children.

The Bush Doctrine established that the U.S. has a responsibility to protect itself by promoting democracy in regions where terrorists are located, aiming to undermine the ideological basis for their activities. Research & Primary Sources

Since the subject "Bush" often refers to the presidency or the broader Bush political family , this guide focuses on the 43rd President's administration (2001–2009). It also covers resources for further research at the George W. Bush Library . Key Policy & Historic Events

For detailed academic or personal research, several official repositories provide primary documents: Global War on Terror - George W. Bush Library