An authoritative military history of the U.S. Army's 3rd Infantry Division in Operation Iraqi Freedom, describing the 2003 invasion of Iraq, the siege and fall of Baghdad, and the nation-building mission that followed.

In 21 Days to Baghdad, historian Dr. Heather Stur describes the commitment of the division to Kuwait, the invasion of Iraq and the three weeks of violent desert conflicts on the way to Baghdad before the siege and battle for the city itself, and the "thunder runs" that saw its fall to U.S. forces. She then details the complex security mission that required the soldiers and their commanders to convince Iraqi citizens that the U.S. was there to help them, while at the same time they continued fighting Saddam Hussein's elite Republican Guard, paramilitary forces, and terrorists.