Reich 
(rīk, rī)
(rīk, rī)n.
The territory or government of a German state, as the Holy Roman Empire, or First Reich, from 962 to 1806; the German Empire, or Second Reich, from 1871 to 1919; the Weimar Republic, from 1919 to 1933; or the Third Reich, from 1933 to 1945.
[German, empire, realm, from Middle High German rīch, rīche, from Old High German rīhhi; see reg- in the Appendix of Indo-European roots.]