The causes of WW1 in videos and outside links

Useful links

 * 1) https://en.wikipedia.org/wiki/World_War_I
 * 2) http://www.ottomanhistorypodcast.com/2011/04/download-podcast-mp3-format-oil-grand.html
 * 3) http://alphahistory.com/worldwar1/alliances/
 * 4) http://europeanhistory.about.com/od/worldwar1/a/World-War-One-The-Major-Alliances.htm
 * 5) http://europeanhistory.about.com/od/worldwar1/p/ww1101.htm

Also see
UK and Commonwealth OTL troop numbers in WW1

The causes of WW1 in videos and outside links