VOLUME 13 NUMBER 2 DECEMBER 2014 A Professional Journal of National Defence College Volume 13 Number 2 December 2014 National Defence College Bangladesh EDITORIAL BOARD Chief Patron Lieutenant General Mollah Fazle Akbar, ndc, psc Editor-in-Chief Rear Admiral Muhammad Anwarul Islam, NGP, ndc, afwc, psc Editor Colonel Md Mahbub-ul Alam, afwc, psc Associate Editors Group Captain Javed Tanveer Khan, afwc, psc, GD(P) Lieutenant Colonel ANM Foyezur Rahman, psc, Engrs Assistant Editors Senior Assistant Secretary Rajib Ahmed Civilian Staff Officer Third Grade Md Nazrul Islam DISCLAIMER The analysis, opinions and conclusions expressed or implied in this Journal are those of the authors and do not necessarily represent the views of the NDC, Bangladesh Armed Forces or any other agencies of Bangladesh Government. Statement, fact or opinion appearing in NDC Journal are solely those of the authors and do not imply endorsement by the editors or publisher. INITIAL SUBMISSION Initial Submission of manuscripts and editorial correspondence should be sent to the National Defence College, Mirpur Cantonment, Dhaka-1216, Bangladesh. Tel: 88 02 9003087, Fax: 88 02 8034715, E mail :
[email protected]. Authors should consult the notes for contributions at the back of the Journal before submitting their final draft. The editors cannot accept responsibility for any damage to or loss of manuscripts. ISSN: 1683-8475 All rights reserved. No part of this publication may be reproduced, stored in retrieval system, or transmitted in any form, or by any means, electrical,