"Some have shown too much defensiveness and have not shown enough focus on digging into and addressing the problems," Gates said. "Also I am concerned that some do not properly understand the need to communicate to the wounded and their families that we have no higher priority than their care, and that addressing their concerns about the quality of their outpatient experience is critically important. Our wounded soldiers and their families have sacrificed much and they deserve the best we can offer."

Harvey has been Army secretary since November 2004. Gates said Harvey will depart March 9. Gates said the Army under secretary, Pete Geren, will become acting secretary until Bush nominates a permanent replacement.

The White House said the president would name a bipartisan commission to assess whether the problems at Walter Reed exist at other facilities. Last week Gates created an outside panel to review the situation at Walter Reed and the other major military hospital in the Washington area, the National Naval Medical Center at Bethesda, Md.

The actions come after The Washington Post documented squalid living conditions for some outpatient soldiers at Walter Reed and bureaucratic problems that prevented many troops from getting adequate care.

Harvey is the second consecutive Army secretary to be removed abruptly from office. In April 2003, then-Defense Secretary Donald H. Rumsfeld fired Thomas White, who had engaged in public disputes with Rumsfeld.

A former businessman trained as an engineer, Harvey counted as one of his proudest achievements a turnaround of the Army's recent recruiting slump. The Army missed its recruiting goal 2005 for the first time since 1999, and that same year Harvey instituted a series of changes that led to a recovery in recruiting.