[1] In the aftermath of unification in 1871, there emerged an intensified interest on the part of German historians in the evolution of highly centralised nation states in France and England during the early modern period.
[1] Someone else who had made the transfer from Bonn to Leipzig in 1884 was Professor Wilhelm Maurenbrecher,[5] evidently Busch's most influential teacher during his student years, about whom he later wrote a brief but appreciative biographical obituary.
He then, in April 1893, transferred from Leipzig to nearby Dresden, having been offered and accepted a full professorship in history at the "Royal Saxon Polytechnic Institute" (as it was known at that time).
[2] In April 1894 he moved again, accepting a full professorship in history at Freiburg University in the extreme south-west of the country.
[1][7] Busch's final career move came in April 1910 when he was offered and accepted a professorship in medieval and modern history at the University of Marburg.