On 5 November, Marines from 3rd Battalion, 6th Marines and 2nd Battalion, 1st Marines began their assault on insurgent-held Karabilah, and had cleared the city four days later. Then on 5 November the coalition forces began to attack the city of Husaybah and pursue any insurgents who fled Karabilah. After four more days of fighting in Husaybah, the coalition troops launched another phase of the operation into the city of Ubaydi, an insurgent haven and site of the earlier Operation Matador. The fortified city fell to coalition forces after seven days of fighting, bringing a conclusion to Operation Steel Curtain. The assault on Sadah and a small portion of Karabilah was known as "Operation: Iron Fist". The assault of Husaybah and Karabilah was "Operation: Steel Curtain". So named because the resident leader of anti-coalition forces, al-Zarqawi, said they would hold onto Husaybah with an "iron fist". Named by Coalition Commanders, "Operation Steel Curtain", was a hardened sweep and clear mission hence "steel curtain" because American and New Iraqi Army flooded the two cities, and closed and secured the objective like a curtain made of steel.
U.S. officials reported that the operation killed 139 insurgents and took 256 more prisoners, and considered it successful. Battle positions were constructed, preventing the insurgency from regaining control of the city. At least 10 U.S. Marines and an unknown number of Iraqi soldiers died. There were 60 civilians killed, among those there were 10 children.