Precisely 20 years ago, on November 22th, 2004, the Treaty on the European Corps and the Status of its Headquarters was signed in Brussels. Twelve years after Eurocorps had been created, this treaty embodied the will of the then five Framework Nations (Germany, Belgium, Spain, France and Luxembourg - Poland would join later, on December 20th, 2021) to establish an undisputed legal basis. As a result, Eurocorps became an entity in the category of sui generis legal objects, i.e. entities whose