Nasiriyah, March–April 2003

The objective
Nasiriyah sat astride the Euphrates River and key bridges on the route north to Baghdad. Marines of Task Force Tarawa were ordered to secure the bridges so the bulk of the 1st Marine Division could pass through.
The ambush
On March 23, an Army maintenance convoy, the 507th Maintenance Company, made a wrong turn into the city and was ambushed. Soldiers were killed and several were taken prisoner. The same day, Marines fighting to seize the bridges met fierce resistance in the city, in a stretch that came to be called "Ambush Alley."
Through the city
On the night of March 24–25, the bulk of Regimental Combat Team 1 passed through the city and attacked north. Other units stayed to clear Nasiriyah, which resisted until April 1.
Significance
Nasiriyah inflicted heavier losses on American forces than most other engagements of the invasion and showed early that irregular fighters would not simply melt away.