![Escadrille Americaine](https://blog.library.si.edu/wp-content/uploads/2013/12/Journaldesmarch00_0055-150x150.jpg)
While the official US involvement in World War I (WWI) did not occur until April of 1917, unofficially the US volunteered military services as part of a squadron known as the Escadrille Lafayette or Escadrille Americaine, as part of the French Air Service.