It’s been one year since the U.S.-led force in Iraq reorganized and changed its name to Multi-National Force Iraq.

In reflecting on that year, the U.S. general in charge of all forces in Iraq is telling his troops there is still much work to be done.

“Since that time, we have fought a ruthless insurgency, trained capable Iraqi security forces, supported reconstruction efforts across Iraq, and witnessed the birth of the first democratically elected government in Iraqi history,” Gen. George Casey wrote in an open letter addressed to “Member of the Coalition” and dated May 15.

“You have executed our mission magnificently and nobly, with dignity, respect and a collective, cooperative and positive spirit that has been truly inspiring,” Casey wrote.

He also urged soldiers to remember their dead and wounded colleagues, and their families.

“While we have had an historic year, we have much left to do here in Iraq,” Casey wrote.