Johannes Kromayer (31 July 1859 in Stralsund – 23 September 1934 in Berlin) was a German classical historian.
[1][2] In 1900 he took part in an expedition to Greece in order to study ancient battlefield sites.
In 1907/08 he studied ancient battlefields in Italy and North Africa.
[1] As a result of his research, he published the four-volume Antike Schlachtfelder ("Ancient Battlefields", 1903–1931).
Schlachten-Atlas Zur Antiken Kriegsgeschichte The Heidelberg Site has medium and high resolution scans of all HEIDI (uni-heidelberg.de) Parts 1-5.2{Note: Pt.6 was never published,thus the total no of maps is v. slightly short of 120}