https://www.google.com.au/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=what%20is%20war
https://answers.yahoo.com/question/index?qid=20080615143431AAgjI5n
http://study.com/academy/lesson/the-war-in-afghanistan-causes-timeline-controversy.html
http://www.lowyinstitute.org/issues/afghanistan-war
http://www.harrybrowne.org/articles/whatiswar.htm
http://www.cfr.org/defense-and-security/ending-war-afghanistan/p31305
https://answers.yahoo.com/question/index?qid=20080615143431AAgjI5n
http://study.com/academy/lesson/the-war-in-afghanistan-causes-timeline-controversy.html
http://www.lowyinstitute.org/issues/afghanistan-war
http://www.harrybrowne.org/articles/whatiswar.htm
http://www.cfr.org/defense-and-security/ending-war-afghanistan/p31305