"Under the Double Eagle" (German: Unter dem Doppeladler), Op. 159, is an 1893 march composed by J. F. Wagner, an Austrian military music composer. The title is a reference to the double eagle in the coat of arms of Austria-Hungary. It was published in the United States in 1902 by Eclipse Publishing Co., a branch of Joseph Morris Music in Philadelphia, Pennsylvania. This piece is in E-flat major, though the Trio is in A-flat major. It is written in ternary form.