After training took place in Germany, the unit was immediately sent to the Eastern Front, in total 350 men. The 350-strong unit led by Major Srnec did not serve long on the Eastern Front. In May 1944, after the fall of Crimea to the Soviet troops, and the destruction of the first Croatian Legion, the 369th (Croatian) Infantry Division, they were then returned to Croatia with the remnants of the Croatian Air Force Legion to defend their homeland that was threatened by Allied air attacks and guerrilla war.