Simplify the following text for a Grade 13 native English-speaking person.
Original: Garegin Njdeh or Garegin Ter-Harutyunyan , Garegin Nzhdeh ( 1 January 1886 , Nakhijevan -- 21 December 1955 , Vladimir , Soviet Union ) was an Armenian statesman , fedayee , political thinker , and , as a member of the A.R.F. Dashnaktsutyun party , was involved in revolutionary activities in Armenia , Bulgaria and Russia , and , as a member of the `` Armenian Legion '' , the armed forces of Nazi Germany .
Simplified: Garegin Njdeh ( , real name : Garegin Ter-Harutiunian , 1 January 1886 - late 1955 ) was an Armenian statesman , military , and political thinker .