▁Star ▁by ▁Head quarters , ▁X ▁Corps , ▁after ▁he ▁had ▁been ▁re ass igned ▁to ▁Washington , ▁D . C .. ▁ ▁In ▁January ▁ 1 9 5 4 , ▁Math es on , ▁a ▁lieutenant ▁colon el , ▁was ▁assigned ▁as ▁assistant ▁chief ▁of ▁staff , ▁G 3 ▁of ▁the ▁ 1 st ▁Infantry ▁Division ▁in ▁U . S . ▁Army , ▁Europe ▁( USA RE UR ); ▁he ▁had ▁previously ▁been ▁assigned ▁to ▁the ▁research ▁and ▁development ▁division ▁of ▁USA RE UR . ▁He ▁was ▁re ass igned ▁from ▁the ▁ 1 st ▁Infantry ▁Division ▁in ▁September ▁ 1 9 5 5 . ▁ ▁During ▁the ▁height ▁of ▁the ▁Cold ▁War , ▁Math es on ▁commanded ▁the ▁ 1 0 th ▁Special ▁Forces ▁Group ▁( A ir bor ne ), ▁Bad ▁T öl z , ▁Federal ▁Republic ▁of ▁Germany , ▁from ▁ 1 9 6 1 ▁to ▁ 1 9 6 3 . ▁ ▁In ▁December ▁ 1 9 6 5 , ▁Math es on ▁was ▁selected ▁for ▁promotion ▁to ▁brig ad ier ▁general . ▁In ▁mid - A pril ▁ 1 9 6 6 , ▁Math es on , ▁still ▁a ▁colon el , ▁who ▁had ▁previously ▁been ▁assigned ▁to ▁the ▁Office ▁of ▁the ▁J oint ▁Chief s ▁of ▁Staff , ▁assumed ▁duty ▁as ▁the ▁ 1 0 1 st ▁Air bor ne ▁Division ' s ▁assistant ▁commander ▁for ▁supporting ▁units ▁at ▁Fort ▁Campbell , ▁Kentucky . ▁Math es on ▁became ▁the ▁commander ▁of ▁the ▁ 1 st ▁Brigade