The map shows southeastern section of Map of invasion of Yugoslavia.
Own work
This file was derived from:

 Map of invasion of Yugoslavia - Situation map.svg
Yugoslavia (1939–41) location map.svg
NATO Map Symbol - Motorised Infantry.svgDerived from;

OSMInformation from:

Vojna enciklopedija, editor Nikola Gažević, pages 186-187.
Kaštel Stari
Goran tek-en, following request by and knowledge from Kaštel Stari