After the Habsburg dynasty had lost large parts of its original Swabian possessions south of the Rhine to the Swiss Confederacy at the 1386 Battle of Sempach, the remaining Fricktal was administered from the Oberamt Breisgau of Further Austria (Vorderösterreich) at Freiburg, while the adjacent Unteraargau region to the south was finally conquered by the Swiss at Bern in 1415.