▁and ▁the ▁Kingdom ▁of ▁Ar les ▁( Upper ▁Burg und y ) ▁in ▁the ▁west . ▁While ▁the ▁Sw ab ian ▁Als ace ▁region ▁was ▁a ▁constitu ent ▁part ▁of ▁the ▁Holy ▁Roman ▁Empire ▁in ▁ 9 6 2 , ▁the ▁adjacent ▁County ▁of ▁Burg und y ▁in ▁the ▁west ▁was ▁not ▁incorpor ated ▁until ▁ 1 0 3 3 . ▁About ▁ 1 0 4 2 ▁the ▁County ▁of ▁Mont b éli ard ▁( M ö mp el g ard ) ▁was ▁established ▁on ▁Burg und ian ▁territory ▁right ▁at ▁the ▁border ▁with ▁the ▁Al sa ci en ▁Sund g au ▁region . ▁Mont b éli ard ▁fell ▁to ▁the ▁Sw ab ian ▁House ▁of ▁Wür ttemberg ▁in ▁ 1 4 0 7 , ▁while ▁the ▁Sund g au ▁region ▁around ▁Fer ret te ▁( P f irt ) ▁and ▁the ▁French - spe aking ▁town ▁of ▁B elf ort ▁( B ef fert ) ▁had ▁been ▁acquired ▁by ▁the ▁H abs burg ▁du ke ▁Albert ▁II ▁of ▁Austria ▁by ▁marriage ▁in ▁ 1 3 2 4 . ▁ ▁The ▁area ▁again ▁marked ▁a ▁border line , ▁when ▁the ▁H abs burg s ▁had ▁to ▁c ede ▁the ▁Sund g au ▁to ▁the ▁Kingdom ▁of ▁France ▁according ▁to ▁the ▁ 1 6 4 8 ▁Peace ▁of ▁West phal ia . ▁Over ▁the ▁following ▁centuries ▁of ▁French – G erman ▁en m ity , ▁the ▁strateg ically ▁important ▁town ▁of ▁B elf ort , ▁situated ▁at ▁the ▁western ▁entrance ▁into ▁the ▁cor rid