On September 19, 1945, American administrators merged the section of the People's State of Hesse with the Prussian provinces of Hesse and Nassau and Frankfurt am Main to form Greater Hesse ().
On September 19, 1945, American officials merged the area of the People's State of Hesse with parts of the Prussian provinces of Hesse and Nassau, and Frankfurt am Main to create a new administrative region known as Greater Hesse.