 The officer cadre was formed from prewar officers and NCOs, graduates of underground courses, and elite operatives usually parachuted in from the West (the Silent Unseen).The basic organizational unit was the platoon, numbering 35–50 people, with a skeleton unmobilized version of 16–25; in February 1944 the Home Army had 6,287 regular and 2,613 skeleton platoons operational.Such numbers made the Home Army not only the largest Polish resistance movement, but one of the two largest in World War II Europe.