Shortly after the Nazi seizure of power in January 1933, Hadamovsky served as the National Programming Director for the German Deutschlandsender broadcaster.

[1] A few months later, he was appointed Reich production director and head of the nationalized Reichs-Rundfunk-Gesellschaft, whereby he played a vital role in the Nazi Gleichschaltung of the incorporated regional broadcasters.

[2][3] Other books include "World History on the March", which was published just before the 1939 Invasion of Poland, and applauded Nazi Germany in general and the return of the Memel Territory, Adolf Hitler's last negotiated territorial gain, previously lost to Lithuania after World War I. Hadamovsky was also author of Blitzmarsch nach Warschau: Frontberichte eines politischen Soldaten (Lightning March to Warsaw: Front Reports of a Political Soldier), an eyewitness account of the Invasion of Poland (1939).

[4] Toward the end of World War II, he joined the 4th SS Polizei Panzergrenadier Division and died in combat, shot through the heart, in the rank of an Obersturmführer (first lieutenant), fighting at the head of his company on the Eastern Front early in March 1945 at Hölkewiese near Rummelsburg in Pomerania.

[5] Hadamovsky is buried in Endgrablage: Block 3 Reihe 31 Grab 1533 - 1548, German military cemetery Neumark / Stare Czarnowo, Poland.