Montgomery Gentry's Eddie Montgomery and Troy Gentry perform at the VAULT Uniform of Heroes: The Taste of Support concert in Atlanta, Ga. The country duo have teamed up with the USO and VAULT energy drink in a program that raises money for the USO and encourages people to send postcards to U.S. troops worldwide.

"We're honored to continue the effort to support our U.S. troops," said Troy. "VAULT and the USO have created a great way to spread goodwill and offer our thanks to the brave men and women serving our country in the U.S. and around the world, and we hope thousands of people will get involved again this year."

Pre-addressed postcards can be found on VAULT displays at convenience and grocery stores across the U.S.

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