For the record, the 2nd and 3rd Battalions 69th Armor of the 3rd Infantry Division -Army made the famous "thunder run" into Baghdad.
"The Marines win battles, the Army wins wars" -James Jones, Commandant of the Marine Corps.
I’m sure the soldiers appreciated having the Marines on their flank and I’m sure they gave them air support as well. The Marines are bad asses! (I’m a former soldier just for the record.)