Bruce Willis is donating five motorcycles for an online auction to benefit veterans and wounded combat troops through the Boot Campaign.

The legendary actor, who was born on a military base in Germany, has been supporting U.S. Forces for years.

The Ducati 1000 DS of Bruce Willis. (Photo: Charity Buzz)

The online auction starts today and ends in August 2013, with one motorcycle going on the block every two months.

''I am thankful to have found the Boot Campaign as the catalyst for using my bikes in a way that will give back to our country's true heroes," Willis said. "These bikes have been a lot of fun to ride, and my hope is they can do a lot of good for our veterans."

The bikes include a 1962 Cushman Eagle, 1972 Harley-Davidson Ironhead Sportster XLH, 1988 Yamaha TW, 1991 Yamaha XT 350, and 2005 Ducati 1000DS (with only 285 miles). You can place your bids at www.charitybuzz.com.