Award-winning singer and songwriter Toby Keith plays for more than 3,500 troops and support personnel stationed in Afghanistan as part of a 12-day, five-country USO tour in 2012. (Dave Gatley/USO) For ...

For decades, country music positioned itself as the unofficial soundtrack of the American military. From Toby Keith's "Courtesy of the Red, White and Blue" to Lee Greenwood's "God Bless the U.S.A." at ...