The people who opposed him were killed or sent to forced labor camps called Gulags. During his Great Purge, in the second half of the 1930s, he instituted various campaigns in order to remove those he considered a threat to his regime (“Joseph Stalin”). By 1939 his secret police also known as the NKVD had removed more than one million party members and thirty five thousand high ranking officers during this purge. The country and military was ultimately negatively affected by this during World War II (Rotnem, Thomas