Three Block War: Nasiriyah, excerpted from the full-length book, examines the gallant action of Marines from Task Force Tarawa during the invasion of Iraq from March 23-April 2, 2003. After crossing the Euphrates River Bridge in Nasiriyah Marines were engaged by Iraqi Army and Republican Guard troops; Baath Party and Fedayeen irregulars; plus fanatical civilians in an gritty fight for survival.