Erika was written by German composer Herms Niel and published in 1938. The song became associated with the Wehrmacht during World War II and is remembered as one of the era’s best-known German marching tunes. Decades later, recordings circulated through documentaries, historical collections, reenactment videos, and internet memes. Its memorable refrain and regular marching cadence make it easy to recognize from a short excerpt. It remains widely used online, usually to signal wartime Germany, military precision, or intentionally uncomfortable historical irony.