MADISON, Wis. (AP) -- Gov. Scott Walker has promoted the state's National Guard commander.

The governor announced Monday that Donald Dunbar has impressed him enough to earn a promotion from brigadier general to major general, a two-star position. The U.S. Senate confirmed his promotion from colonel to brigadier general earlier this month, clearing the way for that body to approve the two-star position in the future.

National Guard officials confirmed last year that the U.S. Air Force Inspector General's office was investigating a complaint against Dunbar, but no details have ever emerged. Guard spokeswoman Lt. Col. Jackie Guthrie says that investigation is over but she didn't know what it was about.

Such complaints are generally kept confidential. A message left with the Air Force's public relations office wasn't immediately returned.

-----------------------

NEWS RELEASE-Gov. Scott Walker has promoted Brig. Gen. Don Dunbar, adjutant general of Wisconsin, to the rank of major general.

"Maj. Gen. Dunbar truly deserves this promotion," Walker said. "His outstanding leadership, his invaluable insight and professional guidance have served Wisconsin well for several years."

Since becoming the state's 30th adjutant general on Sept. 1, 2007, Dunbar has deployed more than 6,000 Soldiers and Airmen in support of the global war on terror including the historic deployment of the entire 32nd Infant Brigade Combat Team to Iraq in 2009. In addition to commanding the Wisconsin National Guard, the adjutant general oversees the state's Emergency Management division, chairs the Governor's Homeland Security Council and is the governor's Homeland Security Advisor.

Since 2007, Dunbar has led the Wisconsin through five separate Stafford Act emergencies. He also serves as vice chair of the FEMA National Advisory Council and was a member of the Local, State, Tribal and Federal Preparedness Task Force which presented a preparedness report to Congress in 2010.

Dunbar began his military career in 1983 and completed pilot training in 1985. He has served as KC-135 functional manager at the National Guard Bureau, staff member for the Office of the Assistant Secretary of Defense for Reserve Affairs, executive officer to the director of the Air National Guard, and commander of the 141st Operations Group.

In 2005 he became commander of the 128th Air Refueling Wing, Wisconsin Air National Guard, at General Mitchell International Airport in Milwaukee. There he commanded more than 900 Airmen and was responsible for maintaining worldwide unit readiness.

Dunbar has volunteered for and deployed on contingency missions including Operations Iraqi Freedom, Enduring Freedom and Northern Watch. A native of Drexel Hill, Penn., Dunbar and his wife Colleen reside in New Berlin.

A formal pinning ceremony will be held at a later date.