This required around 500 SS staff, including 135 non-commissioned officers with combat experience assigned as trainers.[30] About 90,000 youths went through the camps, but due to the recruitment quota system most were compelled to join the Army when they reached the required age.[30] However at one camp near Linz around half the boys joined the SS.[30] During 1942 the number of SS-run camps was significantly reduced due to the requirement of the SS for combat-ready personnel.[31] However, in late 1942, Stabsführer Möckel and Berger convinced Hitler and Heinrich Himmler that special camps should be used specifically for pre-military training.[31] By the middle of 1943, three KLV camps in Germany and four in occupied countries were specifically operated to train Germanic youths willing to join the Waffen-SS.[31]