At the outbreak of what was to become known as World War 1, its reservists and recruits were mainly drawn from that province (Upper Austria). Mobilisation quickly followed and all too soon the Regiment found itself on what was then known as the Russian front, probably better described these days as in the southern part of Poland.

THE ARMY MEDICAL SERVICE OF THE IMPERIAL AND ROYAL (k.u.k) 14th INFANTRY REGIMENT DURING WORLD WAR 1
(Ernst Ludwig, Grand Duke of Hesse)
A UNIT OF THE AUSTRO-HUNGARIAN ARMY

http://www.gwpda.org/medical/14th/intro.htm

Joe