WASHINGTON >> A four-star Army general who was the first head of the new U.S. Africa Command is under investigation and facing possible demotion for allegedly spending hundreds of thousands of dollars improperly on lavish travel, hotels and other items, The Associated Press has learned.

Gen. William “Kip” Ward has been under investigation for about 17 months, and Defense Secretary Leon Panetta is expected to make a final decision on the matter before the end of the month, according to several defense officials.

The defense officials said Ward is facing numerous allegations that he spent several hundred thousand dollars allowing unauthorized people, including family members, to fly on government planes, and spent excessive amounts of money on hotel rooms, transportation and other expenses when he traveled as head of Africa Command.

A four-star general is the highest rank in the Army.

A request seeking comment from Ward was not immediately fulfilled.

Ward commanded U.S. Army troops at Schofield Barracks in Hawaii from July 1999 until November 2000, when he was promoted to a job at the Pentagon.

Panetta’s options regarding Ward are limited by complex laws and military guidelines.

Panetta can demote Ward and force him to retire at a lower rank. Because Ward’s alleged offenses occurred while he was a four-star general, he could be forced to retire as a three-star, which officials said could cost him as much as $1 million in retirement pay over time. It was not immediately clear whether Ward also could face criminal charges.

In order for Ward to be demoted to two-star rank, investigators would have to conclude that he also had problems prior to moving to Africa Command, and officials said that does not appear to be the case.

In making his decision, Panetta has to certify to Congress that Ward served satisfactorily at the rank at which he is retired.

Ward stepped down early last year after serving as the first head of the Europe-based Africa Command, which was created in 2007, and he intended to retire. He did all the paperwork and was hosted at a retirement ceremony in April 2011 at Fort Myer in Virginia, but the Army halted his plans to leave because of the investigation.

Ever since then, he has been working in Northern Virginia, serving as a special assistant to the vice chief of the Army.