WASHINGTON (CNN) -- Responding to complaints from families who say they were given inaccurate causes of death, the Army has begun investigating death reports for more than 1,700 U.S. soldiers who died in Afghanistan and Iraq since 2001.

The Army initiated the move after family members said they were told months after a death that the circumstances were different than originally reported.

"We have made errors in the past with casualty notifications and are rectifying the process with compassion and enthusiasm," the Army said in a written statement.

"We have initiated a complete review of the casualty notification process and are looking at it step by step from the battlefield to the return of remains to the family."

Next week the Army will require that all units go back to the start of the war in October 2001, locate every unit-level investigation and list them for the Army casualty office.

That way the office can ensure the reports are compared with others, such as criminal investigations and safety reports.

If reports differ, families will be notified of any changes in the circumstances of that soldier's death, the Army said.

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