We didn't disband the army, the army disintegrated on its own.
Actually John Ford we did disband the Iraqi Army.
John Blair said it was a big mistake
http://www.abc.net.au/news/newsitems/200409/s1207413.htmAnd just for the record we also
• Purged tens of thousands of former Baath Party members from the government, many of whom had joined the party only to feed their families, instead of rooting out only Saddam's most loyal henchmen.
• Failed to restore public services and underestimating the mammoth task of rebuilding Iraq's shattered economy.
• Waited too long to recognize the gravity of the insurgency, then reacting at times with excessive force that caused numerous civilian casualties, broke cultural taboos and turned Iraqis against the U.S.-led occupation.
And didn't stop the looting of museums and weapons depots.