On January 18, 1871 Germany was unified with Wilhelm I as its first kaiser & this man as its chancellor
[DOC] [TLE] William I | emperor of Germany | Britannica.com [PAR] German emperor from 1871, as well as king of Prussia from 1861, a sovereign 
whose ... William I, German in full Wilhelm Friedrich Ludwig (born March 22, 1797
, ... From October 1858 William was regent for his ailing brother, and, on Jan. ...