The Libyan Army was the branch of the Armed Forces of the Libyan Arab Jamahiriya, the Libyan Arab Republic and the Libyan Kingdom responsible for ground warfare. In 2009 the International Institute for Strategic Studies estimated that the Ground Forces of the Libyan Arab Jamahiriya numbered 25,000 with an additional, estimated, 25,000 conscripts (total estimated 50,000). The IISS estimated that the Ground Forces were organised into 11 Border Defence and 4 Security Zones, one regime security brigade (the 32nd Khamis Brigade), 10 Tank Battalions, 10 Mechanised Infantry Battalions, 18 Infantry Battalions, 6 Commando Battalions, 22 Artillery Battalions, 4 SSM Brigade and 7 Air Defence Artillery Battalions.Doctrine is a mixture of Egyptian doctrine which was adopted after the 1969 coup and soci