Rags
“Rags was a Cairn Terrier mix who served as the mascot of the 1st Infantry Division during World War I. Though he was a small dog, Rags relayed messages from the front lines. His greatest moment of heroism came during the Meuse-Argonne Campaign in 1918, when he ran a vital message through falling bombs. Although the terrier was gassed and partially blinded, he survived.” – Source: DogGuide.net